co-pilot vs crew

co-pilot and crew both are nouns.

Word	Noun	Adjective	Verb	Adverb
co-pilot	Yes	No	No	No
crew	Yes	No	Yes	No

co-pilot (noun)	crew (noun)
a relief pilot on an airplane	an organized group of workmen
	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

co-pilot (verb)	crew (verb)
	serve as a crew member on