crew vs aircrew

crew and aircrew both are nouns.

Word	Noun	Adjective	Verb	Adverb
crew	Yes	No	Yes	No
aircrew	Yes	No	No	No

As nouns, aircrew is a hyponym of crew; that is, aircrew is a word with a more specific, narrower meaning than crew:

Other hyponyms of crew include air crew, merchant marine.

crew (noun)	aircrew (noun)
an organized group of workmen	the crew of an aircraft
the men and women who man a vehicle (ship, aircraft, etc.)
the team of men or women manning a racing shell
an informal body of friends

crew (verb)	aircrew (verb)
serve as a crew member on