| Thor | Thor |
| Thor Heyerdahl | Thor Heyerdahl |
| Thor Steinar | Thor Steinar |
| Thor Vilhjálmsson | Þór Vilhjálmsson |
| Thora Birch | Thora Birch |
| thoracic | torácico |
| Thoracic vertebrae | Vértebra dorsal |
| thoracotomy | taracotomía |
| thorax | pecho |
| Thorgal | Thorgal |
| Thorin II Oakenshield | Thorin Escudo de Roble |
| Thorin Oakenshield | Thorin Escudo de Roble |
| Thorismund | Turismundo |
| thorium | torio |
| Thormodus Torfæus | Thormodus Torfæus |
| thorn | espina |
| thorn apple | estramonio |
| Thorne system | Sistema Thorne |
| Thorney Island | Thorney Island |
| Thornton Wilder | Thornton Wilder |
| thorny | espinoso |
| Thorny Devil | Moloch horridus |
| Thorondor | Thorondor |
| thorough | completo |
| thorough search | registro minucioso |
| thoroughbred | puro |
| Thoroughfar | Tránsito astronómico |
| thoroughfare | pasaje |
| thoroughgoing | completo |
| thoroughly | completamente |
| thoroughness | minuciosidad |
| Thorstein Veblen | Thorstein Veblen |
| thorybism | toribismo |
| those | aquella |
| those qualified to vote | electorado |
| those who | los que |
| Those Who Hunt Elves | Those Who Hunt Elves |
| Thot | Tot |
| Thoth | Tot |
| thou | tú |
| though | sin embargo |
| thought | intención |
| thought experiment | experimento mental |
| thought police | policía del pensamiento |
| thoughtful | atento |
| thoughtfully | atentamente |
| thoughtfulness | consideración |
| thoughtless | atolondrado |
| thoughtlessly | irreflexivamente |
| thousand | mil |
| Thousand Days War | Guerra de los Mil Días |
| Thousand Island dressing | Thousand Island Dressing |
| Thousand origami cranes | Mil grullas de origami |
| Thousand years old | Milenio |
| thousandfold | mil veces |
| thousandth | milésimo |
| THQ | THQ |
| Thrace | Tracia |
| Thracia | Tracia |
| Thracian | Tracia |
| Thracian language | Idioma tracio |
| Thracian Tomb of Kazanlak | Tumba tracia de Kazanlak |
| Thracians | Tracios |
| thraldom | esclavitud |
| thrall | esclavo |
| thralldom | esclavitud |
| Thranduil | Thranduil |
| Thrasamund | Trasamundo |
| thrash | azotar |
| thrash about | chapotear |
| thrash around | chapotear |
| Thrashcore | Thrashcore |
| thrashing | paliza |
| Thrasivoulos Zaimis | Thrasivulos Zaimis |
| Thrasybulus | Trasíbulo |
| Thrasymachus | Trasímaco |
| thread | ensartar |
| Thread safety | Thread-Safety |
| threadbare | calvo |
| threadbareness | sordidez |
| Threaded discussion | Hilo de ejecución |
| thready | fibroso |
| threat | amenaza |
| threaten | amenazar |
| threaten with | amenazar con |
| threatened | amenazado |
| Threatened species | Especies amenazadas |
| threatening | amenazador |
| threateningly | amenazantemente |
| three | tres |
| Three August Ones and Five Emperors | Tres augustos y cinco emperadores |
| Three Blind Mice and Other Stories | Tres ratones ciegos y otras historias |
| Three body problem | Problema de tres cuerpos |
| Three Cheers for Sweet Revenge | Three Cheers For Sweet Revenge |
| Three color photometry | Fotometría con tres colores |
| Three Crowns | Three Crowns |
| Three Days Grace | Three Days Grace |
| Three domain system | Dominio |
| Three Gorges Dam | Presa de las Tres Gargantas |
| three hundred | trescientos |
| Three Kingdoms | Tres Reinos |
| Three Kingdoms of Korea | Tres Reinos de Corea |
| Three Kings | Tres reyes |
