cinque vs pentad

cinque and pentad both are nouns.

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

As nouns, cinque and pentad are synonyms defined as:

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

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