terzetto vs tercet

terzetto and tercet both are nouns.

Word	Noun	Adjective	Verb	Adverb
terzetto	Yes	No	No	No
tercet	Yes	No	No	No

As nouns, terzetto and tercet are synonyms defined as:

terzetto and tercet: the cardinal number that is the sum of one and one and one

Other synonyms of terzetto include 3, deuce-ace, III, leash, ternary, ternion, three, threesome, tierce, trey, triad, trine, trinity, trio, triplet, troika.

terzetto (noun)	tercet (noun)
the cardinal number that is the sum of one and one and one	the cardinal number that is the sum of one and one and one