ground-service crew vs gang

ground-service crew and gang both are nouns.

Word	Noun	Adjective	Verb	Adverb
ground-service crew	Yes	No	No	No
gang	Yes	No	Yes	No

As nouns, gang is a hypernym of ground-service crew; that is, gang is a word with a broader meaning than ground-service crew:

ground-service crew: the crew of technicians and mechanics who service aircraft on the ground
gang: an organized group of workmen

Other hypernyms of ground-service crew include crew, work party.

ground-service crew (noun)	gang (noun)
the crew of technicians and mechanics who service aircraft on the ground	tool consisting of a combination of implements arranged to work together
	an organized group of workmen
	an association of criminals
	an informal body of friends

ground-service crew (verb)	gang (verb)
	act as an organized group