Nouns

(n)three, 3, III, trio, threesome, tierce, leash, troika, triad, trine, trinity, ternary, ternion, triplet, tercet, terzetto, trey, deuce-acethe cardinal number that is the sum of one and one and one
(n)trio, triad, triplet, triplea set of three similar things considered as a unit
(n)trio, threesome, triad, trinitythree people considered as a unit
(n)common chord, triada three-note major or minor chord; a note and its third and fifth tones