troupe vs Greek chorus

troupe and Greek chorus both are nouns.

Word	Noun	Adjective	Verb	Adverb
troupe	Yes	No	No	No
Greek chorus	Yes	No	No	No

As nouns, Greek chorus is a hyponym of troupe; that is, Greek chorus is a word with a more specific, narrower meaning than troupe:

troupe: organization of performers and associated personnel (especially theatrical)
Greek chorus: a company of actors who comment (by speaking or singing in unison) on the action in a classical Greek play

troupe (noun)	Greek chorus (noun)
organization of performers and associated personnel (especially theatrical)	a company of actors who comment (by speaking or singing in unison) on the action in a classical Greek play