| Triceratops | triceratops |
| Trizeratops | triceratops |
| Trinitatis | Trinity Sunday |
| Tribrachys | tribrach |
| Trigraph | trigraph |
| Trizeps | triceps |
| Iterator | iterator |
| Trematode | trematode |
| Trialis | trial |
| Tribeca | Tribeca |
| Tricho | trichotillomania |
| Trickbetrug | con game |
| Tricks | hanky-panky |
| Trient | Trento |
| Triest | Trieste |
| Trimaran | trimaran |
| Trinkrohr | drinking straw |
| Triptoton | triptote |
| Triton | Triton |
| trickreich | artful |