pentad vs cinque

pentad and cinque both are nouns.

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

As nouns, pentad and cinque are synonyms defined as:

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

pentad (noun)	cinque (noun)
the cardinal number that is the sum of four and one	the cardinal number that is the sum of four and one