| thermosetting | termoindurente |
| thermosphere | termosfera |
| Thermostability | Resistenza al calore |
| thermostat | termostato |
| thermostatic | termostatico |
| thermostatistics | termostatistica |
| thermotechnical | termotecnica |
| thermotropism | termotropismo |
| thermovoltaic | termovoltaico |
| Theropoda | Theropoda |
| Thersander | Tersandro |
| Therwil | Therwil |
| thesaurus | tesoro |
| Thescelosaurus | Thescelosaurus neglectus |
| these | quei |
| these days | oggigiorno |
| Theseus | Teseo |
| thesis | tema |
| Thesmophoria | Tesmoforie |
| Thesmophoriazusae | Tesmoforiazuse |
| Thespis | Tespi |
| Thesprotia | Tesprozia |
| Thessalia | Tessaglia |
| Thessalonica of Macedon | Thessalonike |
| Thessaloniki | Salonicco |
| Thessaloniki Metro | Metropolitana di Salonicco |
| Thessaloniki Prefecture | Salonicco |
| Thessaly | Tessaglia |
| Thestius | Testio |
| Theta | Theta |
| Theta Eridani | Acamar |
| Theta function | Funzioni theta |
| Theta Scorpii | Sargas |
| Theta Ursae Majoris | Theta Ursae Majoris |
| Thetford | Thetford |
| thetic | tetico |
| Thetis | Teti |
| Theudebald | Teodebaldo |
| Theudebert I | Teodeberto I |
| Theudebert II | Teodeberto II |
| Theuderic I | Teodorico I |
| Theuderic II | Teodorico II |
| Theuderic III | Teodorico III |
| Theuderic IV | Teodorico IV |
| Theudigisel | Teudiselo |
| Theudimer | Teodemaro |
| Theudis | Teudi |
| Theudoald | Teodoaldo |
| thewed | muscoloso |
| thewless | debole |
| thews | muscoli |
| they | loro |
| they are worth | valgono |
| They Call Me Renegade | Renegade - Un osso troppo duro |
| They Call Me Trinity | Lo chiamavano Trinità |
| They Came to Baghdad | Il mondo è in pericolo |
| They Came to Bahgdad | Il mondo è in pericolo |
| they can | puònno |
| they could | possevanto |
| They Died with Their Boots On | La storia del generale Custer |
