sextet vs sextuplet

sextet and sextuplet both are nouns.

Word	Noun	Adjective	Verb	Adverb
sextet	Yes	No	No	No
sextuplet	Yes	No	No	No

As nouns, sextet and sextuplet are synonyms defined as:

sextet and sextuplet: the cardinal number that is the sum of five and one

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

sextet (noun)	sextuplet (noun)
a musical composition written for six performers	the cardinal number that is the sum of five and one
six people considered as a unit
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