chorus vs musical organisation

chorus and musical organisation both are nouns.

Word	Noun	Adjective	Verb	Adverb
chorus	Yes	No	Yes	No
musical organisation	Yes	No	No	No

As nouns, musical organisation is a hypernym of chorus; that is, musical organisation is a word with a broader meaning than chorus:

Other hypernyms of chorus include musical group, musical organization.

chorus (noun)	musical organisation (noun)
the part of a song where a soloist is joined by a group of singers	an organization of musicians who perform together
any utterance produced simultaneously by a group
a group of people assembled to sing together
a body of dancers or singers who perform together
a company of actors who comment (by speaking or singing in unison) on the action in a classical Greek play

chorus (verb)	musical organisation (verb)
utter in unison
sing in a choir