| Thiersheim | Thiersheim |
| Thierstein | Thierstein |
| Thietmar of Merseburg | Thietmar z Merseburga |
| thigh | udo |
| thighbone | kość udowa |
| thimble | naparstek |
| Thimphu | Thimphu |
| Thimphu District | Thimphu |
| thin | chudy |
| Thin client | Cienki klient |
| Thin layer chromatography | TLC |
| Thin Lizzy | Thin Lizzy |
| Thin-film optics | Optyka cienkich warstw |
| Thin-film transistor | TFT |
| thine | twój |
| thing | przedmiot |
| thingamajig | wihajster |
| Thingol | Thingol |
| thingy | wihajster |
| think | myśleć |
| Think tank | Think tank |
| thinker | myśliciel |
| thinking | myślenie |
| Thinking machine | Komputer |
| Thioacetamide | Tioacetamid |
| thioarsenate | tioarsenian |
| Thioester | Tioestry |
| thioether | tioeter |
| Thiokol | Thiokol |
| Thiol | Tiole |
| Thiomersal | Thiomersal |
| Thionyl chloride | Chlorek tionylu |
| thiosulfate | tiosiarczan |
| thiosulfuric acid | kwas tiosiarkowy |
| Thiourea | Tiomocznik |
| third | trzeci |
| Third Age | Trzecia Era |
| Third Anglo-Dutch War | III wojna angielsko-holenderska |
| Third Battle of Chattanooga | Bitwa pod Chattanooga |
| Third Battle of Kharkov | Bitwa pod Demiańskiem |
| Third Battle of the Isonzo | Bitwy nad Isonzo |
| Third Council of Constantinople | Sobór Konstantynopolitański III |
| Third Council of the Lateran | Sobór Laterański III |
| Third Crusade | III wyprawa krzyżowa |
| Third dynasty of Egypt | III dynastia |
| Third Dynasty of Ur | Trzecia dynastia z Ur |
| Third generation computer | Komputer trzeciej generacji |
| Third Girl | Trzecia lokatorka |
| Third Italian War of Independence | Wojna siedmiotygodniowa |
| Third Macedonian War | III wojna Rzymu z Macedonią |
| third person | trzecia osoba |
| Third Position | Terceryzm |
| Third Punic War | III wojna punicka |
| Third Reich | III Rzesza |
| Third Republic | III Republika Francuska |
| Third Servile War | Powstanie Spartakusa |
| Third Silesian Uprising | Powstania śląskie |
| third time's a charm | do trzech razy sztuka |
| Third Watch | Brygada ratunkowa |
| Third World | Trzeci Świat |
| Third-person shooter | Third-person shooter |
| Third-rate film | Kapusta rzepak |
| thirst | pragnienie |
| thirsty | spragniony |
| thirteen | trzynaście |
| Thirteen Colonies | Trzynaście kolonii |
| Thirteen-spotted lady beetle | Czerwonka trzynastokropka |
| thirteen-year | trzynastoletni |
| thirteen-year-old | trzynastoletni |
| thirty | trzydzieści |
| Thirty Tyrants | Trzydziestu Tyranów |
| Thirty Years' War | Wojna trzydziestoletnia |
| thirty-eight | trzydzieści osiem |
| thirty-five | trzydzieści pięć |
| thirty-four | trzydzieści cztery |
| thirty-nine | trzydzieści dziewięć |
| thirty-one | trzydzieści jeden |
| thirty-seven | trzydzieści siedem |
| thirty-six | trzydzieści sześć |
| thirty-three | trzydzieści trzy |
| Thirty-Three Orientals | Trzydziestu Trzech Orientalczyków |
| thirty-two | trzydzieści dwa |
| Thirukkural | Tirukkural |
| Thiruvananthapuram | Thiruvananthapuram |
| this | tak |
| this and that | to i owo |
| this evening | wieczorem |
| This Is a Call | This Is a Call |
| This Is England | To właśnie Anglia |
| This Is Spinal Tap | Spinal Tap |
| This Land Is Your Land | This Land Is Your Land |
| this time | tym razem |
| This Used to Be My Playground | This Used to Be my Playground |
| this way | tędy |
| Thisted | Gmina Thisted |
| Thisted municipality | Gmina Thisted |
| thistle | oset |
| thither | tam |
| Thiès | Thies |
| Thiès Department | Thies |
| Thiès Region | Thies |
| Thlaspi arvense | Tobołki polne |
| Thom Yorke | Thom Yorke |
| Thomas | Tomasz |
| Thomas Abbt | Thomas Abbt |
| Thomas Addison | Thomas Addison |
| Thomas Alva Edison | Thomas Alva Edison |
| Thomas Anders | Thomas Anders |
| Thomas Aquinas | Tomasz z Akwinu |
| Thomas Arne | Thomas Augustine Arne |
| Thomas Bayes | Thomas Bayes |
| Thomas Becket | Thomas Becket |
| Thomas Bernhard | Thomas Bernhard |
| Thomas Berthold | Thomas Berthold |
| Thomas Bottomore | Thomas Burton Bottomore |
| Thomas Brdarić | Thomas Brdarić |
| Thomas Brown | Thomas Browne |
| Thomas Browne | Thomas Browne |
| Thomas Bérard | Thomas Béraud |
| Thomas Cardinal Williams | Thomas Stafford Williams |
| Thomas Carlyle | Thomas Carlyle |
| Thomas Cech | Thomas Cech |
| Thomas Cooray | Thomas Benjamin Cooray |
| Thomas County | Hrabstwo Thomas |
| Thomas Cranmer | Thomas Cranmer |
| Thomas Curtis | Thomas Curtis |
| Thomas de Quincey | Thomas de Quincey |
| Thomas Doll | Thomas Doll |
| Thomas Dossevi | Thomas Dossevi |
| Thomas Eakins | Thomas Eakins |
| Thomas Edison | Thomas Alva Edison |
| Thomas Eugene Kurtz | Thomas Kurtz |
| Thomas Fincke | Thomas Fincke |
