2 possible definitions for '3'
Under this definition, 3 is a noun and has the following properties:
trinity, triplet, ternary, leash, trey, troika, triad, trio, threesome, tierce, trine, III, three, ternion, tercet, terzetto, deuce-ace have the same meaning as '3'
Under this definition, 3 is an adjective and has the following properties:
cardinal is similar to 3.