clover deuce-ace leash set of three shamrock tercet ternary ternion terzetto three threeness threesome tierce trefoil trey triad triality trialogue triangle tricorn trident triennium trihedron trilogy trimester trine trinomial trio triphthong triple triple crown triple threat tripleness triplet triplicity triplopy tripod triptych trireme triseme triskelion trisul triumvirate triune triunity trivet troika