troika vs ternion

troika and ternion both are nouns.

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

As nouns, troika and ternion are synonyms defined as:

troika and ternion: 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, terzetto, three, threesome, tierce, trey, triad, trine, trinity, trio, triplet.

troika (noun)	ternion (noun)
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