Grammar-Quizzes › Noun Phrases › Nouns–Suffixes › Noun Suffixes
Our plane departed from San Francisco on time. We arrived in San Diego at 11:00 a.m. The plane landed without difficulty. A bus transported us promptly and comfortably to our hotel.
The departure of our plane from San Francisco was on time. Our arrival in San Diego was at 11:00 a.m. The landing of the plane was not difficult. The transportation by bus to our hotel was prompt and comfortable.
VERB WORD FORM | |
---|---|
Nouns may be formed from verbs, adjectives or other nouns. The forms are often Latin or Greek in origin. There is no simple rule for adding suffixes, but there are patterns. |
|
SUBJECT | PREDICATE + COMPLEMENT |
NOUN PHRASE | VERB + PP / ADJ |
Our plane |
departed from San Francisco on time. |
We |
arrived in San Diego at 11:00 a.m. |
The plane |
landed without difficulty. |
A bus |
transported us to our hotel promptly and comfortably. |
NOUN WORD FORM | |
---|---|
Adding a suffix to a verb (base) is one way of forming a noun. A suffix is a part added to the end of a word. Examples of suffixes are listed below. Modifiers to the noun are enclosed in brackets [ ]. |
|
SUBJECT | PREDICATE + COMPLEMENT |
NOUN PHRASE | "BE" VERB + PP / ADJ |
The departure [of our plane from San Francisco] |
was on time. |
Our arrival [in San Diego] |
was at 11:00 a.m. |
The landing [of the plane] |
was not difficult. |
The transportation [by bus to the hotel] |
was prompt and comfortable. |
an affix — is a small unit of meaning that is added to another word to change its meaning; affixes include: prefix (before) pre-pare; infix (between) [rare in English]; and suffix (after) prepara-tion.
derive (V) — come from a source or origin; derivation (N) the formation of a word from another word or base
prompt (Adj) — on time or timely, not delayed
morpheme (N) — a small unit of meaning which is dependent upon the word to which it is added
a suffix, a morpheme (small dependent unit of meaning) placed at the end of a word, can change a word as follows: [1] word category—noun "nominalization", adjective "adjectivalization", verb "verbalization", adverb of manner -ly; [2] person (3rd per. sing.); [3] number (singular/plural); [4] tense (present/past).
(Swan 384 noun + complement ; 445.2 noun suffixes)
Also see Plural Noun Forms | Adjective Suffixes | Word Forms | Adverb Suffixes | Negative Noun Prefixes | Noun Properties.
SUFFIX | VERB – NOUN | VERB – NOUN | VERB – NOUN |
---|---|---|---|
-AL condition, quality |
arrive –arrival approve – approval |
deny –denial propose –proposal |
refuse – refusal dismiss – dismissal |
-ANCE / -ENCE action, state, condition or quality |
attend –attendance accept –acceptance |
prefer – preference insure – insurance |
refer – reference exist –existence |
-ATION / -TION action or resulting state |
educate – education inform – information |
eliminate – elimination declare – declaration |
combine – combination immigrate – immigration |
-SION action or resulting state |
confuse – confusion decide – decision |
divide –division revise – revision |
impress – impression profess–profession |
-URE action or resulting state |
depart – departure erase – erasure |
fail – failure enclose – enclosure |
press – pressure legislate – legislature |
-MENT state, act, condition |
agree– agreement pay – payment |
employ – employment argue – argument |
punish – punishment govern – government |
-AGE action, state, process |
break – breakage post – postage |
pack – package pass – passage |
bag– baggage marry – marriage |
-ING action, state, process |
bless – blessing land – landing |
write – writing feed – feeding |
end –ending seat – seating |
-ERY a business or trade, a behavior, a condition |
cream – creamery slave (N) – slavery |
bake –bakery brave (Adj) – bravery |
brew – brewery machine (N) – machinery |
Nominalization – the forming of words from other categories , verbs and nouns, by suffixation. (Huddleston 1706)
stress – the part of the word that receives emphasis is bolded. You can also Control-click the word to access your computer's dictionary.
Pop-Q "The fix"
VERB WORD FORM | |
---|---|
Nouns may be formed from adjectives. The forms are often Latin or Greek in origin. There is no simple rule for adding suffixes, but there are patterns. |
|
SUBJECT | PREDICATE COMPLEMENT |
The passengers |
were happy. |
The aircraft |
was safe. |
The flight attendants |
were polite. |
Their information |
is private. |
NOUN WORD FORM | |
---|---|
Adding a suffix to an adjective is another way of forming a noun. A suffix is the part added to the end of a word. |
|
SUBJECT | PREDICATE COMPLEMENT |
Their happiness |
was obvious. easy to see |
Safety |
was important. |
Politeness |
is not always easy. |
Privacy |
is expected. |
SUFFIX | ADJECTIVE – NOUN | ADJECTIVE – NOUN | ADJECTIVE – NOUN |
---|---|---|---|
-NESS state, quality, condition |
happy – happiness useful – usefulness |
kind – kindness truthful – truthfulness |
quiet – quietness sleepy – sleepiness |
-ITY state or condition |
active – activity stupid – stupidity |
curious – curiosity mobile – mobility |
real – reality tranquil – tranquility |
-ISM state, practice |
ideal – idealism colonial – colonialism |
human – humanism imperial – imperialism |
conservative – conservatism favorite – favoritism |
-TH condition |
wide – width dead – death |
long – length foul – filth |
born (V) – birth grow (V) – growth |
-Y condition |
private – privacy difficult – difficulty |
honest – honesty jealous – jealousy |
modest – modesty
|
-ERY location, collective, behavior condition |
brave – bravery |
|
|
-TY condition |
safe – safety cruel – cruelty |
certain – certainty subtle – subtlety |
loyal – loyalty admiral (N) – admiralty |
Also see Adjective Forms for: -able, -ant, -ary, -ed, -en -ent, -ful, -ic, -ical, -less, -ing, -ive, -ish, -like, -y.
Also see Negative Prefixes for : a-, dis-, il-, in-, im-, ir-, non-, un-.
VERB WORD FORM | |
---|---|
Personal nouns may be formed from other word forms—specific verbs, adjectives and nouns. |
|
SUBJECT | PREDICATE + COMPLEMENT |
The company |
employs workers. (V) |
The man |
took refuge in the US. (N) |
Nature Beauty |
is real. (Adj) is ideal. |
NOUN WORD FORM | |
---|---|
Specific verbs adjectives and nouns permit the addition of suffixes such as -ee, -ant or -ent, -ist, -man, -ster, -arian, and -eer. The suffix is unstressed. |
|
SUBJECT | PREDICATE + COMPLEMENT |
Employees (V→N) |
work for the company. |
The refugee (N→N) |
asked for protection. |
The realist (Adj→N) The idealist (Adj→N) |
sees things as they are. sees things as they should be. |
refuge (N) — shelter, protection from danger
SUFFIX | VERB – PERSONAL NOUN | VERB – PERSONAL NOUN | VERB– PERSONAL NOUN |
---|---|---|---|
-ANT / ENT person / instrument / agent |
attend– attendant assist – assistant |
inform – informant correspond – correspondent |
preside – president reside – resident |
-EE person / instrument / recipient of action |
appoint – appointee attend – attendee |
pay – payee trust – trustee |
divorce¹ – divorcée (V/N) license – licensee (V/N) |
-IST person who practices |
tour – tourist
|
machine (V) – machinist |
type – typist |
-AR person who does
|
beg – beggar burgle – burglar |
lie – liar |
registrate – registrar |
-ER person who does
|
advertise – advertiser believe – believer build – builder |
buy – buyer call – caller interpret – interpreter |
keep – keeper listen – listener pitch – pitcher |
-OR person who does |
act – actor collect – collector dictate – dictator |
direct – director instruct – instructor legislate – legislator |
navigate – navigator sail – sailor spectate – spectator |
¹divorce — end a marriage: (N) The divorce was final. (V) They will divorce.
SUFFIX | ADJ – PERSONAL NOUN | ADJ – PERSONAL NOUN | ADJ– PERSONAL NOUN |
---|---|---|---|
-IST person who practices |
active – activist colonial – colonialist extreme – extremist |
human – humanist ideal – idealist imperial – imperialist |
left – leftist natural – naturalist nude – nudist |
-STER person connected to |
young¹ – youngster old¹ – oldster |
hip — hipster |
|
¹ young / old — could be an adj or a noun: (Adj) He is young not old. vs. (Group noun) The young have time, the old do not.
SUFFIX | NOUN – PERSONAL NOUN | NOUN – PERSONAL NOUN | NOUN– PERSONAL NOUN |
---|---|---|---|
-ARIAN holders of a particular doctrine /ər i ən/ |
vegetable – vegetarian discipline – disciplinarian |
human – humanitarian sect – sectarian |
parliament – parliamentarian |
-EE person / instrument /i/ |
address (N/V) – addressee |
refuge (N) – refugee |
|
-ER person concern with /ər/ |
farm (N/V) – farmer hat – hatter |
law – lawyer jewel – jeweler |
prison – prisoner village – villager |
-EER person concerned with /ɪər / |
engine –engineer profit – profiteer |
musket – musketeer racket – racketeer |
auction – auctioneer mountain – mountaineer |
-MAN person concerned with /mən/ or /mæn/ (if stressed) |
police–policeman congress – congressman |
horse – horseman fish – fisherman |
fire – fireman post – postman |
-IST person who practices /ist/ |
bicycle – bicyclist (N→N) cartoon – cartoonist (N→N) |
column – columnist physics – physicist |
terror – terrorist violin – violinist |
-STER person connected to /stər/ |
game – gamester gang – gangster mob – mobster |
prank – prankster song – songster trick – trickster |
old¹ – oldster spin² – spinster |
¹ young / old – could be an adj or a noun: (Adj) He is young not old. vs. (Group noun) The young have time, the old do not.
² spinster – used for a woman who has never married, "a spinner of thread"; a person who does yarn spinning
London – Londoner See Demonyms.
(Huddleston 19 5.7 Nominalizations) (Swan 384-6)
SUFFIX | MASCULINE – FEMININE | MASCULINE – FEMININE | NEUTER/MASC. – FEMININE |
---|---|---|---|
-ETTE feminine / diminutive (French) |
brunet¹ (Adj) [Fr. masc.] – brunette (fem.)
|
bachelor² (N) – bachelorette major (N) – majorette |
suffrage³ (N) – suffragette coque (N) [Fr. "rooster"] – coquette |
-TRIX / -TRICE feminine (Latin)
|
aviator (N) – aviatrix dominator (N) – dominatrix administrator (N) – administratrix |
executor (N) – executrix director (N) – directrice (fem.) |
beatus (N) [Latin "who makes happy"] – Beatrice |
-TRESS /-ESS feminine (French from -ISSA Greek) |
actor (N) – actress (wait staff) master/mister(N) – mistress ( Ms.) |
seducer (N) – seductress lion (N) – lioness |
Melissa ("honey bee") Clarissa |
-IENNE feminine (French) |
comedian (N) – comedienne |
equestrian (N) – equestrienne |
Adrian (name masc.)– Adrienne |
-ÉE feminine (French) |
fiancé (Partcpl) – fiancée
|
divorcé (Partcpl) – divorcée |
|
¹ brun (French) – brown; masculine hair color brunet (Fr) feminine brunette (Fr / Eng)
² bachelor (N) – a young unmarried man; a college degree
³ suffrage – the right to vote
-ISSA (Greek) – meli "honey" Melissa ("honey bee"); Clarissa (fem./diminutive of Clara)
Find word origins (etymology) on Dictionary.com.
SUFFIX | STANDARD – DIMINUATIVE | STANDARD – DIMINUATIVE | STANDARD – DIMINUATIVE |
---|---|---|---|
-ETTE diminutive (French) |
case (N) [Fr. casse] – cassette towel (N) – towelette novel (N) – novelette (novela) |
vinegar (N) – vinaigrette kitchen (N) – kitchenette rouelle (FR. "wheel") – roulette rose (N) – rosette |
cigar (N) – cigarette toilet (N) – toilette³ (N) (ethics) (N) [Fr.] – etiquette vine (N) [Fr.] "vigne" – vignette |
-SIE / SY
|
foot– footsie one – onesie (one-piece baby wear) |
tiny (Adj) – teensie weensie hot (Adj) – hotsy-totsy |
Patricia / Pat – Patty / Patsie ? – Tootsie |
-IE / Y
|
cook (N/V) – cookie hood (N) – hoodie lad (N) – laddie |
pup (N) – puppy duck (N) – ducky mom (N) – mommy |
Bob – Bobby Thomas – Tommy Susan – Susie |
-LET |
book (N) – booklet brace (N) – bracelet cut (N) – cutlet (small cut of meat) |
out (Adv) – outlet owl (N) – owlet [alemelle "thin plate" OFr.] – omelet |
tart (N) – tartlet toile (N "small cloth" Fr.) – toilet viola (N "purple flower" Lat.) – violet |
-LING
|
change (V) – changeling (folklore– baby left by fairy) dear (Adj) – darling duck (N) – duckling |
found (V) – foundling (abandoned baby) hire (V) hireling (menial or hourly worker) nest (N) – nestling |
prince (N) – princeling under (Adv) – underling (subordinate) |
-KIN [Dutch / German / -quin French] |
pumpkin "pepon" melon (Grk.) lambkin "lamb" (1570) |
munchkin Wizard of Oz (1900) bumpkin "little barrel" a simple person (M. Dutch) |
napkin "nappe" little table cloth (O. Fr.) ramekin (little baking dish "ram") (M. Dutch), ramequin (Fr.) |
¹ brun (French) — brown masculine brunet (Fr) feminine brunette (Fr / Eng)
² bachelor (N) – a young unmarried man; a college degree Bachelor's degree.
³ toilette – may refer to a toilet (commode) or to the process of bathing and grooming
peponi – melon (Greek)
nape – table cloth in (Middle English)
munchkin – dwarf in Wizard of Oz
-cule — molecule, animacule, capsule
-ello / -ella — bordello, limoncello, salmonella, Ella (name)
silhouette – à la silhouette, after Etienne de Silhouette
Find word origins (etymology) Dictionary.com.
NOUN WORD FORM | |
---|---|
A collective noun may be formed from other nouns. The nouns below refer to individuals. |
|
SUBJECT | PREDICATE + COMPLEMENT |
A star |
lives a public life. |
Our partner |
is Sky Airways. |
A child |
enjoys playtime. |
COLLECTIVE NOUN WORD FORM | |
---|---|
Some nouns permit a suffix such as -ship, -dom or -hood. These suffixes express a state, condition, or office of all the individuals within the group. |
|
SUBJECT | PREDICATE + COMPLEMENT |
Stardom |
can attract too much attention. |
Our partnership |
has been successful. |
Childhood |
lasts a short time. |
SUFFIX | NOUN – COLL. NOUN | NOUN – COLL. NOUN | OTHER – COLL. NOUN |
---|---|---|---|
-DOM state, condition, dignity, office |
star – stardom fan – fandom |
bore – boredom king – kingdom |
free – freedom (Adj→N) wise – wisdom (Adj→N) |
-SHIP state, condition, skill, office, associated with |
censor – censorship partner – partnership |
scholar – scholarship dealer – dealership |
workman – workmanship apprentice – apprenticeship |
-HOOD state, collective |
brother – brotherhood widow – widowhood |
neighbor – neighborhood child – childhood |
live – livelihood (V→N) false – falsehood (Adj→N) |
-ERY location, collective, behavior condition |
slave – slavery (collective state) |
machine – machinery |
citizens – citizenry (collective) |
-dom archdukedom, bachelordom, boredom, chiefdom, computerdom, coupledom, czardom, freedom, gangsterdom, hippiedom, kaiserdom, kingdom, princedom, serfdom, sheikdom, sheriffdom, wisdom, yuppiedom
-ship airmanship, authorship, captainship, censorship, comradeship, dealership, fellowship, kingship, kinship, lordship, mentorship, partnership, readership, scholarship, sponsorship, sponsorship, viewership, workmanship
-hood adulthood, babyhood, boyhood, brotherhood, childhood, cousinhood, falsehood, fatherhood, girlhood, knighthood, likelihood, livelihood, manhood, motherhood, nationhood, parenthood, priesthood, sisterhood, statehood, toddlerhood, widowhood, womanhood
-ery adultery, antislavery, baptistery, bewitchery, buffoonery, chancellery, demagoguery, distillery, effrontery, gendarmerie, housewifery, jackassery, lampoonery, machinery, midwifery, millinery, monastery, perfumery, presbytery, savagery, skullduggery, slavery, snobbery, thievery, tomfoolery, villager, witchery
VERB |
---|
A suffix normally marks a word as an adjective, verb, or noun. A suffix is placed at the end of the word. The words below are verbs. |
The pilots will attempt to take off together. |
The pilots will control their aircrafts. |
The aircraft will rise into the air. |
The aircraft will circle in the air. (loop) |
NOUN |
---|
In some cases, the same form of the word is used for the verb or the noun. The words below are nouns which are resulting states of the action of the verb. |
The attempt was successful. subj NP |
The pilot's control was effective. subj NP |
The rise will be sharp. subj NP |
The path of the aircraft will form a circle. obj NP |
SUBJ NP – subject noun phrase
No suffix — also known as 'conversion' , 'zero-affixation' or 'zero-derivation'.
arrest (V) – arrest (N) |
attempt (V) – attempt (N) |
bore (V) – bore (N) |
cheat (V) – cheat (N) |
coach (V) – coach (N) |
cough (V) – cough (N) |
desire (V) – desire (N) |
flirt (V) – flirt (N) |
go (V) – go (N) |
grin (V) – grin (N) |
laugh (V) – laugh (N) |
read (V) – read (N) |
smile (V) – smile (N) |
sneak (V) – sneak (N) |
spy (V) – spy (N) |
whisper (V) – whisper (N) |
whistle (V) – whistle (N) |
win (V) – win (N) |
|
|
boss (V) – boss (N) |
butcher (V) – butcher (N) |
butter (V) – butter (N) |
cash (V) – cash (N) |
eye (V) – go (N) |
finger (V) – finger (N) |
fish (V) – fish (N) |
gesture (V) – gesture (N) |
knife (V) – knife (N) |
knot (V) – knot (N) |
motion (V) – motion (N) |
nap (V) – nap (N) |
panic (V) – panic (N) |
parody (V) – parody (N) |
parrot (V) – parrot (N) |
queue (V) – queue (N) [Br-En] |
ski (V) – ski (N) |
skin (V) – skin (N) |
water (V) – water (N) |
zero (V) – zero (N) |
(Huddleston 19 §3.1)
acCENT (V) – ACcent (N) |
conDUCT (V) – CONduct (N) |
conFLICT (V) – CONflict (N) |
conTEST (V) – CONtest (N) |
conVERT (V) – CONvert (N) |
conVICT (V) – CONvict (N) |
deCREASE (V) – DEcrease (N) |
deSERT (V) – DESert¹ (N) |
diGEST (V) – DIgest (N) |
esCORT (V) – EScort (N) |
exPORT (V) – EXport (N) |
fragMENT (V) – FRAGment (N) |
inSERT (V) – INsert (N) |
inSULT (V) – INsult (N) |
perMIT (V) – PERmit (N) |
preSENT (V) – PREsent (N) |
reCORD (V) – REcord (N) |
reJECT (V) – REject (N) |
transFER (V) – TRANSfer (N) |
susPECT (V) – SUSpect (N) |
¹ de-sert' [Latin (V) deserere "abandon, forsake"] → des' ert [Latin (N) desertum "a land that is abandoned"] → des-sert' [French (N) desservir "to clear the table"]. ("dessert" See Word Origin from Dictionary.com)
(Huddleston 19 §2.6)
Also see dessert vs. desert in Lesson 15 "Commonly Misspelled Words." Keys to Spelling: Sounds and Syllables, 29 Aug. 2016, www.grammar-quizzes.com/spellingsum.html. Printable 3MB PDF.
NOUN WORD FORM |
---|
A noun may end in -ing. To test if a word is a noun: (1) put an article before it or (2) a prepositional phrase after it. If not awkward sounding, then the word shares these properties belonging to nouns. |
NOUN PHRASE |
(1) ACCEPTS AN ARTICLE |
The landing was not difficult. The landings were not difficult. |
(2) IS SINGULAR OR PLURAL IN AGREEMENT |
The landing / A landing is not difficult. The landings / landings are not difficult. |
(3) ACCEPTS MODIFIERS |
A smooth landing was not difficult. (Adj) The landing of the airplane was not difficult. (Prep Phrase) The landing that the pilot made was impressive. (Rel Cls) |
(4) DOES NOT ACCEPT A NOUN PHRASE COMPLEMENT |
*The landing the plane was not difficult. |
GERUND WORD FORM |
---|
A verbal form called a gerund (gerund-participle) ends in -ing. If it is a gerund, it (1) will not accept an article or any modifiers and (2) will be singular in agreement. See Gerund-Participle comparison of properties. |
GERUND CLAUSE |
(1) DOES NOT ACCEPT AN ARTICLE |
Landing the plane was not difficult. *The landing the plane was not difficult. |
(2) IS ALWAYS SINGULAR IN AGREEMENT |
Landing was not difficult. |
(3) DOES NOT ACCEPT MODIFIERS |
*Smooth landing the airplane was not difficult. *Landing of the airplane was not difficult. *Landing that was smooth was not difficult. |
(4) MAY ACCEPT A NOUN PHRASE COMPLEMENT |
Landing the plane was not difficult. (Object noun) |
Also see Participle Modifiers 2 and Gerunds.
Also see Noun Properties | Noun, Verb, Gerund, Participle Properties. (Apply tests to determine if a word functions as other members in a category.)
advertise (V) – advertising (N) |
airbrush (V) – airbrushing (N) |
beat (V) – beating (N) |
bless (V) – blessing (N) |
board (V) – boarding (N) |
bookmark (V) – bookmarking (N) |
come (V) – coming (N) |
dance (V) – dancing (N) |
edge (V) – edging (N) |
end (V) – ending (N) |
feed (V) – feeding (N) |
forget (V) – forgetting (N) |
forward (V) – forwarding (N) |
fund (V) – funding (N) |
handwrite (V) – handwriting (N) |
highlight (V) – highlighting (N) |
make (V) – making (N) |
market (V) – marketing (N) |
open (V) – opening (N) |
paint (V) – painting (N) |
plant (V) – planting (N) |
read (V) – reading (N) |
seat (V) – seating (N) |
understand (V) – understanding (N) |
"deverbal nouns" (Huddleston 19 5.7.2g)
If you are unsure whether a word ending in -ing is a noun, add a determiner and/or a modifier. For example, compare "landing" and "flying". Add a determiner: The landing was smooth. *The flying was smooth. Or add a modifier: The landing in Atlanta was smooth. *The flying in the airplane was smooth. [Use the flight instead.] However, we could say, "The flying of the national flag is a sign of patriotism."
*incorrect use
ERROR |
---|
Informal speech may include using a verb form as a noun when a true noun form exists: ~ What's the ask on that house? ~ Let's see the reveal. ~Have a listen to this. ~ Do the reboot and call me later. |
Using a noun form as a modifier when a true adjective exists: ~ The education research suggests that we need to improve in math. |
SOLUTION |
---|
This trendy usage is probably occurring as shortened form in texting. What is the asking price. / What is the question regarding that house? Let's reveal the changes. / The revelation caused a protest. Listen to this. Take a look at this. Reboot it and call me later. After rebooting, call me. |
The educational research suggests that we need to improve in math. The research in education suggests that we need to improve in math. |
Note: In many cases a noun can modify another noun, however, if there is an adjective form for a word, use it.
* Incorrect use / ~ Questionable use
Pop-Q – "The fix"
International travel requires passing through airports and that can be challenging. Making a -reserve- is mostly done online nowadays. The -seat- is first come, first served, so it is important to plan ahead. On the day of your trip, you should plan an early -arrive- to the airport. You should be there at least two hours before the -depart- of an international flight. -Process- for checking in passengers can take a long time.
An agent will ask you to show your -identify-. A security agent will ask you a few -quest- about the contents of your baggage. Then they will permit your -enter- into the secure area of the airport. Another agent will announce the -board- of the aircraft. At that time, you will walk down a long -pass- to the door of the airplane.
content – what is inside of something (bag)
process – a series of actions directed toward completing a goal
Transportation in my country is very difficulty to use. There are several buses, but they are always congestion with riding people. The arrivings and departings are rarely on schedule. The taxis are no better because the pay for a trip is too high. Most people have a prefer share a ride. The government regulations drivers.
However, no one does inspections to see if they are following the regulations. Most people prefer the inter-city train ( tram) that connectors the neighborhoods of the city. The train attenders keep the train clean and safe. The other option is to walk and use local shopping and services.
attend (V) – be present, care for, watch over
congestion (N) – overcrowding, excessive amount in a small place
connect (V) – join together, link
inspect (V) – examine details
opt (V) – choose, select
regulate (v..) – control by rule
It is indispensable to supervise aircraft checks. ⇒
It is important to maintain an airplane.
It is necessary to inspect the engines.
It is critical to employ good technicians.
It is essential to transport passengers safely.
It is dangerous for any part of the airplane to fail.
It is required to approve all work on the aircraft.
It is necessary to replace all worn parts.
It is logical to require safety updates.
It is reasonable to retire an aircraft after twenty years.
The supervision of aircraft is indispensable.
The… is important.
The… is necessary.
The… is critical.
The… is essential.
The… is dangerous.
The… is required.
The… is necessary.
The… is logical.
The… is reasonable.
Also see "It is" + Adjective + Infinitive