six vs sextet

six and sextet both are nouns.

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

As nouns, six and sextet are synonyms defined as:

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

six (noun)	sextet (noun)
a playing card or domino or die whose upward face shows six pips	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

six (adjective)	sextet (adjective)
denoting a quantity consisting of six items or units