| Thor | Thor |
| Thor Heyerdahl | Thor Heyerdahl |
| Thora Birch | Thora Birch |
| thoracentesis | toracentesi |
| thoracic | toracico |
| thoracic vertebra | vertebra toracica |
| Thoralf Skolem | Albert Thoralf Skolem |
| Thorame-Haute | Thorame-Haute |
| thorax | petto |
| Thorgal | Thorgal |
| Thorianite | Thorianite |
| Thorigne-Fouillard | Thorigne-Fouillard |
| Thorigné-Fouillard | Thorigné-Fouillard |
| Thorin II Oakenshield | Thorin Scudodiquercia |
| Thorin Oakenshield | Thorin Scudodiquercia |
| Thorismund | Torismondo |
| thorium | torio |
| thorn | spina |
| thorn bush | roveto |
| Thorn Commission | Commissione Thorn |
| thorn in someone's side | spina nel fianco |
| thornbill | colibrì |
| thornless | senza spine |
| thorns | spine |
| Thornton Wilder | Thornton Wilder |
| thorntree | acacia |
| thorny | spinoso |
| Thorny Devil | Moloch horridus |
| Thorolf Rafto Memorial Prize | Premio Rafto |
| thorough | completo |
| thorough search | perquisizione |
| thoroughbred | puro |
| thoroughfare | strada principale |
| thoroughgoing | assoluto |
| thoroughly | assolutamente |
| thoroughly bad fellow | arnese |
| thoroughness | precisione |
| thorp | villaggio |
| Thorstein Veblen | Thorstein Veblen |
| those | questo |
| those people | coloro |
| those present | presenti |
| those qualified to vote | elettorato |
| those who | quelli che |
| Thossfell | Thossfell |
| Thot | Thot |
| Thoth | Thot |
| thou | tu |
| Thouaret | Thouaret |
| Thouars | Thouars |
| though | comunque |
| thought | intenzione |
| thought about | pensato |
| thought experiment | esperimento mentale |
| thought police | psicopolizia |
| Thought wrong | Malveduto |
| Thoughtcrimes | Thoughtcrimes - Nella mente del crimine |
| Thoughtform | Tulpa |
| thoughtful | assorto |
| thoughtfully | attentamente |
| thoughtfulness | attenzione |
| thoughtless | avventato |
| Thoughtless blunder | Smemoratezza |
| thoughtlessly | senza pensare |
| thoughts | pensai |
| thousand | mille |
| Thousand Sons | Stirpe dei Mille |
| Thousand years old | Millennio |
| thousands | mille |
| thousandth | millesimo |
| THQ | THQ |
| Thrace | Tracia |
| Thracia | Tracia |
| Thracian | Tracia |
| Thracian language | Lingua tracica |
| Thracian Tomb of Kazanlak | Tomba tracia di Kazanlăk |
| Thracian Tomb of Sveshtari | Tomba tracia di Sveštari |
| Thracians | Traci |
| Thrakomakedones | Thrakomakedones |
| thraldom | schiavitù |
| thrall | schiavitù |
| thralldom | schiavitù |
| Thranduil | Thranduil |
| Thrapsano | Thrapsano |
| Thrasamund | Trasamondo |
| thrash | battere |
| thrash about | agitarsi |
| thrash around | agitarsi |
| Thrashcore | Thrashcore |
| thrasher | chi batte |
| thrashes | bastonato |
| thrashing | botte |
| thrashings | bruciacchiare |
| thread | infilare |
| Thread gauge | Contafiletti |
| Thread of the conversation | Gugliata |
| Thread pitch gauge | Contafiletti |
| threadbare | logoro |
| threaded | filettato |
| Threaded discussion | Thread |
| threading | rigatura |
| threadlike | filiforme |
| thready | fibroso |
| threat | minaccia |
| threaten | minacciare |
