quintet vs musical organisation

quintet and musical organisation both are nouns.

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

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

Other hypernyms of quintet include musical group, musical organization.

quintet (noun)	musical organisation (noun)
a musical composition for five performers	an organization of musicians who perform together
five people considered as a unit
a set of five similar things considered as a unit
five performers or singers who perform together
the cardinal number that is the sum of four and one