| Triosonate | trio sonata |
| Triefnase | runny nose |
| Trikont | Third World |
| trigonal | trigonal |
| Trisomie | trisomy |
| trillionste | quintillionth |
| Sonate | sonata |
| Triade | triad |
| Tribune | tribune |
| Tribüne | stand |
| Trient | Trento |
| Triest | Trieste |
| Trionfi | major arcana |
| Tristan | Tristan |
| Tristesse | humdrum dejection |
| Triton | Triton |
| Trivialname | common name |
| Triage | triage |
| Tribologie | tribology |
| Tribometer | tribometer |