ground crew vs work party

ground crew and work party both are nouns.

Word	Noun	Adjective	Verb	Adverb
ground crew	Yes	No	No	No
work party	Yes	No	No	No

As nouns, work party is a hypernym of ground crew; that is, work party is a word with a broader meaning than ground crew:

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

Other hypernyms of ground crew include crew, gang.

ground crew (noun)	work party (noun)
the crew of technicians and mechanics who service aircraft on the ground	an organized group of workmen