quartet vs quartette

quartet and quartette both are nouns.

Word	Noun	Adjective	Verb	Adverb
quartet	Yes	No	No	No
quartette	Yes	No	No	No

As nouns, quartet and quartette are synonyms defined as:

As nouns, quartet and quartette are synonyms defined as:

Other synonyms of quartet include foursome.

As nouns, quartet and quartette are synonyms defined as:

quartet and quartette: a set of four similar things considered as a unit

Other synonyms of quartet include quadruple, quadruplet.

As nouns, quartet and quartette are synonyms defined as:

quartet (noun)	quartette (noun)
a musical composition for four performers	a musical composition for four performers
four people considered as a unit	four people considered as a unit
a set of four similar things considered as a unit	a set of four similar things considered as a unit
four performers or singers who perform together	four performers or singers who perform together
the cardinal number that is the sum of three and one