threesome vs triad

threesome and triad both are nouns.

Word	Noun	Adjective	Verb	Adverb
threesome	Yes	No	No	No
triad	Yes	No	No	No

As nouns, threesome and triad are synonyms defined as:

Other synonyms of threesome include trinity, trio.

As nouns, threesome and triad are synonyms defined as:

threesome and triad: the cardinal number that is the sum of one and one and one

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

threesome (noun)	triad (noun)
three people considered as a unit	a three-note major or minor chord; a note and its third and fifth tones
the cardinal number that is the sum of one and one and one	three people considered as a unit
	a set of three similar things considered as a unit
	the cardinal number that is the sum of one and one and one