troika vs digit

troika and digit both are nouns.

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

As nouns, digit is a hypernym of troika; that is, digit is a word with a broader meaning than troika:

Other hypernyms of troika include figure.

troika (noun)	digit (noun)
a Russian carriage pulled by three horses abreast	a finger or toe in human beings or corresponding body part in other vertebrates
a modern Russian triumvirate	one of the elements that collectively form a system of numeration
the cardinal number that is the sum of one and one and one	the length of breadth of a finger used as a linear measure