threesome vs troika

threesome and troika both are nouns.

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

As nouns, threesome and troika are synonyms defined as:

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

threesome (noun)	troika (noun)
three people considered as a unit	a Russian carriage pulled by three horses abreast
the cardinal number that is the sum of one and one and one	a modern Russian triumvirate
	the cardinal number that is the sum of one and one and one