triplet vs triad

triplet and triad both are nouns.

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

As nouns, triplet and triad are synonyms defined as:

Other synonyms of triplet include trio, triple.

As nouns, triplet and triad are synonyms defined as:

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

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

triplet (noun)	triad (noun)
a set of three similar things considered as a unit	a three-note major or minor chord; a note and its third and fifth tones
one of three offspring born at the same time from the same pregnancy	three people considered as a unit
the cardinal number that is the sum of one and one and one	a set of three similar things considered as a unit
	the cardinal number that is the sum of one and one and one