threesome vs trine

threesome and trine both are nouns.

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

As nouns, threesome and trine are synonyms defined as:

threesome and trine: 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, triad, trinity, trio, triplet, troika.

threesome (noun)	trine (noun)
three people considered as a unit	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