| Thor Heyerdahl | Thor Heyerdahl |
| Thora | Thora |
| Thoracic diaphragm | Pessar |
| Thorbjørn Jagland | Thorbjørn Jagland |
| thorium | thorium |
| thorn | torn |
| thorn apple | pigæble |
| Thornback ray | Sømrokke |
| thorp | torp |
| Thorsberg moor | Torsbjerg Mose |
| Thorvald Stauning | Thorvald Stauning |
| Thot | Thoth |
| Thoth | Thoth |
| thou | du |
| though | dog |
| thought | tanke |
| thought police | tankepoliti |
| thousand | tusinde |
| Thousand years old | Millennium |
| Thrace | Thrakien |
| Thracia | Thrakien |
| Thracian | Thrakien |
| thralldom | trældom |
| thread | tråd |
| Threaded discussion | Muret væg |
| threat | trussel |
| threaten | true |
| threatened | truet |
| three | tre |
| Three Cheers for Sweet Revenge | Three Cheers For Sweet Revenge |
| Three Days Grace | Three Days Grace |
| Three domain system | Domæne |
| Three Godfathers | Tre liv for ét |
| Three Gorges Dam | De Tre Slugters Dæmning |
| Three Jewels | De tre juveler |
| Three Kingdoms | Tre Kongedømmer |
| Three Laws of Robotics | De tre love |
| Three letter acronym | TLA |
| Three Mile Island accident | Three Mile Island-ulykken |
| Three Mile Island Nuclear Generating Station | Three Mile Island-ulykken |
| Three Musketeers | De Tre Musketerer |
| three times | tre gange |
| Three Wise Men | Hellig tre konger |
| three-dimensional | tredimensional |
| Three-domain system | Domæne |
| three-headed | trehovedet |
| Three-phase AC | Vekselspænding |
| Three-phase alternating current | Vekselspænding |
| Three-phase electric power | Vekselspænding |
| threesome | trio |
| thresher | tærskemand |
| threshold | tærskel |
| Threskiornithidae | Ibisser |
| thrips | thrips |
| thrive | trives |
| throat | hals |
| Throat singing | Strubesang |
| Thrombotic thrombocytopenic purpura | ITP |
| through | færdig |
| through-composed | gennemkomponeret |
| throughway | motorvej |
| throw | kaste |
| throw in the towel | kaste håndklædet i ringen |
| throw up | kaste op |
| throw-in | indkast |
| thrush nightingale | nattergal |
| thrust | støde |
| Thrust vectoring | Vectored thrust |
| thruway | motorvej |
| Thrymr | Trym |
| Thu | Don |
| Thucydides | Thukydid |
| thud | bump |
| Thuja | Thuja |
| Thuja occidentalis | Almindelig Thuja |
| Thuja plicata | Kæmpe-Thuja |
| Thujopsis | Hønsebenstræ |
| Thule | Thule |
| Thule Air Base | Thule Air Base |
| Thule Island | Thule |
| Thule people | Thule |
| Thule Society | Thuleselskabet |
| thulium | thulium |
| thumb | tommelfinger |
| Thumb-print | Fingeraftryk |
| Thumbelina | Tommelise |
| thumbnail | tommelfingernegl |
| thunder | torden |
| Thunderball | Thunderball |
| ThunderCats | ThunderCats |
| thunderstorm | tordenskylle |
| Thur | Torsdag |
| Thur River | Thur |
| Thuringia | Thüringen |
| Thurisaz | Jætte |
| Thurs | Torsdag |
| Thursday | torsdag |
| Thursdays | Torsdag |
| thus | så |
| THX | THX |
| thy | din |
| Thyborøn-Harboøre | Thyborøn-Harboøre Kommune |
| Thyestes | Thyestes |
| Thyholm municipality | Thyholm Kommune |
| Thylacine | Tasmansk pungulv |
| Thylacinidae | Tasmansk pungulv |
| Thylacinus | Tasmansk pungulv |
| Thyme | Timian |
| Thymelaeaceae | Dafne-familien |
| Thymine | Thymin |
| Thyone | Thyone |
| Thyra | Thyra Dannebod |
| Thyroid | Skjoldbruskkirtel |
