| Trick-taking game | Bitka |
| Tricky | Težak |
| trident | trizob |
| Trie | Bor |
| Trier | Človek |
| Trieste | Trst |
| Triglav | Triglav |
| Triglav National Park | Triglavski narodni park |
| Trignometric function | Trigonometricna funkcija |
| Trigonometric function | Trigonometrična funkcija |
| Trigonometry | Trigonometrija |
| Trigraph | Tričrkje |
| Trilateral Commission | Trilateralna Komisija |
| Trillion | Trilijon |
| trilobite | trilobit |
| Trilogy | Trilogija |
| Trinidad | Sveta Trojica |
| Trinidad and Tobago | Trinidad in Tobago |
| Trinitrotoluene | Trinitrotoluen |
| Trinity | Sveta Trojica |
| Trinity Sunday | Sveta Trojica |
| Trinomial nomenclature | Tričlensko poimenovanje |
| Trioxidane | Divodikov trioksid |
| Triple Alliance | Centralne sile |
| Triple Crown of Motorsport | Trojna krona |
| Triple deities | Trias |
| Triple Entente | Antanta |
| Triple-double | Trojni dvojček |
| Triple-point | Trojna točka |
| Tripoly | Tripoli |
| triskaidekaphobia | triskaidekafobi |
| Tristan | Tristan in Izolda |
| Tristan and Iseult | Tristan in Izolda |
| Tristan and Isolde | Tristan in Izolda |
| Tristan chord | Tristanov akord |
| Tristan da Cunha | Tristan da Cunha |
| Tristan und Isolde | Tristan in Izolda |
| Tristán de Luna y Arellano | Tristán de Luna y Arellano |
| Tristão da Cunha | Tristan da Cunha |
| tritium | tritij |
| Triton | Triton |
| Triturus | Triton |
| Triumph of the Will | Triumf volje |
| triumvirate | triumvirat |
| TRIZ | TRIZ |
| Trnava | Trnava |
| Trnava District | Trnava |
| Trnava Region | Trnava |
| Trnovska vas | Občina Trnovska vas |
| Troad | Troda |
| Trochlea | Škripec |
| Trogonidae | Trogon |
| Trogons | Trogon |
| troika | trojka |
| Trojan | Trojan |
| Trojan horse | Trojanski konj |
| Trojan moon | Trojanski satelit |
| Trojan War | Trojanska vojna |
| Troll | Trolanje |
| Troll oil field | Trolanje |
| trolley bus | trolejbus |
| trolleybus | trolejbus |
| trombone | pozavna |
| Troms | Troms |
| Tromsø | Tromsø |
| trophic level | trofični nivo |
| trophy | trofeja |
| tropic | povratnik |
| Tropic of Cancer | Rakov povratnik |
| Tropic of Capricorn | Kozorogov povratnik |
| Tropical cyclone | Tropski ciklon |
| tropical forest | tropski gozd |
| tropical plant | tropska rastlina |
| tropical rain forest | tropski deževni gozd |
| tropics | tropi |
