triplet vs trey

triplet and trey both are nouns.

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

As nouns, triplet and trey are synonyms defined as:

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

triplet (noun)	trey (noun)
a set of three similar things considered as a unit	one of four playing cards in a deck having three pips
one of three offspring born at the same time from the same pregnancy	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