pentad vs quintet

pentad and quintet both are nouns.

Word	Noun	Adjective	Verb	Adverb
pentad	Yes	No	No	No
quintet	Yes	No	No	No

As nouns, pentad and quintet are synonyms defined as:

Other synonyms of pentad include 5, cinque, fin, five, fivesome, Little Phoebe, Phoebe, quint, quintuplet, V.

pentad (noun)	quintet (noun)
the cardinal number that is the sum of four and one	a musical composition for five performers
	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