Open English Wordnet
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)one-third, third, tierceone of three equal parts of a divisible whole“it contains approximately a third of the minimum daily requirement”