chain gang vs work party

chain gang and work party both are nouns.

Word	Noun	Adjective	Verb	Adverb
chain gang	Yes	No	No	No
work party	Yes	No	No	No

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

Other hypernyms of chain gang include crew, gang.

chain gang (noun)	work party (noun)
a gang of convicts chained together	an organized group of workmen