team vs crew

team and crew both are nouns.

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

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

team (noun)	crew (noun)
a cooperative unit (especially in sports)	an organized group of workmen
two or more draft animals that work together to pull something	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

team (verb)	crew (verb)
form a team	serve as a crew member on