triumvirate vs troika

triumvirate and troika both are nouns.

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

As nouns, troika is a hyponym of triumvirate; that is, troika is a word with a more specific, narrower meaning than triumvirate:

triumvirate: a group of three men responsible for public administration or civil authority
troika: a modern Russian triumvirate

triumvirate (noun)	troika (noun)
a group of three men responsible for public administration or civil authority	a Russian carriage pulled by three horses abreast
	a modern Russian triumvirate
	the cardinal number that is the sum of one and one and one