troika vs threesome

troika and threesome both are nouns.

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

As nouns, troika and threesome are synonyms defined as:

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

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

troika (noun)	threesome (noun)
a Russian carriage pulled by three horses abreast	three people considered as a unit
a modern Russian triumvirate	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