quintette vs fivesome

quintette and fivesome both are nouns.

Word	Noun	Adjective	Verb	Adverb
quintette	Yes	No	No	No
fivesome	Yes	No	No	No

As nouns, quintette and fivesome are synonyms defined as:

Other synonyms of quintette include quintet.

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