sestet vs hexad

sestet and hexad both are nouns.

Word	Noun	Adjective	Verb	Adverb
sestet	Yes	No	No	No
hexad	Yes	No	No	No

As nouns, sestet and hexad are synonyms defined as:

Other synonyms of sestet include 6, Captain Hicks, half a dozen, sextet, sextuplet, sise, six, sixer, VI.

sestet (noun)	hexad (noun)
a musical composition written for six performers	the cardinal number that is the sum of five and one
a rhythmic group of six lines of verse
a set of six similar things considered as a unit
six performers or singers who perform together
the cardinal number that is the sum of five and one