crew vs crewman

crew and crewman both are nouns.

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

crew (noun)	crewman (noun)
an organized group of workmen	a member of a work crew
the men and women who man a vehicle (ship, aircraft, etc.)	a member of a flight crew
the team of men or women manning a racing shell	any member of a ship's crew
an informal body of friends

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