crew vs section gang

crew and section gang both are nouns.

Word	Noun	Adjective	Verb	Adverb
crew	Yes	No	Yes	No
section gang	Yes	No	No	No

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

Other hyponyms of crew include shift, detail, chain gang, ground-service crew, ground crew, road gang, stage crew.

crew (noun)	section gang (noun)
an organized group of workmen	a work crew assigned to a section of a railroad
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)	section gang (verb)
serve as a crew member on