triumvirate

As nouns the difference between triarchy and triumvirate

is that triarchy is government by three persons; a triumvirate while triumvirate is a group or association of three, especially three statesmen.

As nouns the difference between taxonomy and triumvirate

is that taxonomy is the science or the technique used to make a classification while triumvirate is a group or association of three, especially three statesmen.

As nouns the difference between triumvirate and trifecta

is that triumvirate is a group or association of three, especially three statesmen while trifecta is a bet in which the bettor must select the first three placegetters of a race in the order in which they finish.