| trevlighet | quaintness |
| trevligt | nicely |
| trevnad | comfort |
| Trevor Berbick | Trevor Berbick |
| Treväppling | Clover |
| Trey Parker | Trey Parker |
| Treycovagnes | Treycovagnes |
| Treytorrens | Treytorrens |
| Treyvaux | Treyvaux |
| tri- | tri- |
| triad | triad |
| Triagonalt kristallsystem | Rhombohedral crystal system |
| trial-and-error | trial and error |
| triangel | triangle |
| triangelformig | triangular |
| Triangelgalaxen | Triangulum Galaxy |
| Triangelhandeln | Triangular trade |
| Triangeln | Triangle |
| triangulering | triangulation |
| triangulär | triangular |
| Trianonfördraget | Treaty of Trianon |
| Trias | Triassic |
| Triathlon vid Olympiska sommarspelen | Triathlon at the Summer Olympics |
| Tribal Wars | Tribal Wars |
| Triballi | Triballi |
| tribologi | tribology |
| Tribonianus | Tribonian |
| tribun | tribune |
| tribunal | tribunal |
| tribut | price |
| tribut- | tributary |
| triceps | triceps |
| Triceps brachii | Triceps brachii muscle |
| Triceratops | Triceratops |
| Trichonida | Lake Trichonida |
| trick | trick |
| Trick med speglar | They Do It with Mirrors |
| Tricorder | Tricorder |
| Tridekan | Tridecane |
| Tridentinsk rit | Tridentine Mass |
| Tridentinska kyrkomötet | Council of Trent |
| Triduum sacrum | Easter Triduum |
| Trient | Trient |
| Trier | Trier |
| Trieste | Trieste |
| Trietylamin | Triethylamine |
| Triffiderna anfaller | The Day of the Triffids |
| Triffidernas dag | The Day of the Triffids |
| Triforium | Blind-story |
| Triftar | Armeria |
| Triftväxter | Plumbaginaceae |
| trigeminusneuralgi | trigeminal neuralgia |
| Trigger Happy TV | Trigger Happy TV |
| Triglav | Triglav |
| trigonometri | trigonometry |
