| Theo van Gogh | Theo van Gogh |
| Theo Walcott | Theo Walcott |
| Theobald Boehm | Theobald Böhm |
| Theobroma | Kakao-slægten |
| theocracy | teokrati |
| Theocrasy | Teokrati |
| Theodolite | Teodolit |
| Theodor Brorsen | Theodor Brorsen |
| Theodor Herzl | Theodor Herzl |
| Theodor Mommsen | Theodor Mommsen |
| Theodor Storm | Theodor Storm |
| Theodora | Theodora |
| Theodore | Theodor |
| Theodore Racing | Theo |
| Theodore Roosevelt | Theodore Roosevelt |
| Theodoric II | Teoderik den Store |
| Theodoric the Great | Teoderik den Store |
| Theodoros Angelopoulos | Theo Angelopoulos |
| theology | teologi |
| Theophil Freiherr von Hansen | Theophilus Hansen |
| Theophrastaceae | Samel-familien |
| Theophrastus | Theofrastos |
| Theora | Theora |
| Theorem | Sætning |
| Theorem of Pythagoras | Den pythagoræiske læresætning |
| Theoretical philosophy | Teoretisk filosofi |
| Theorie | Teori |
| Theory | Teori |
| Theory of cognition | Erkendelsesteori |
| Theory of imputation | Theorie der Beschuldigung |
| Theory of literature | Teori |
| Theory of music | Musikteori |
| Theory of relativity | Relativitetsteori |
| Theory of special relativity | Speciel relativitetsteori |
| theosophic | teosofisk |
| theosophy | teosofi |
| Theotokos | Jomfru Maria |
| therapist | terapeut |
| therapy | behandling |
| Theravada | Theravada |
| there | der |
| there is | der er |
| there is an exception to every rule | ingen regel uden undtagelse |
| there's no accounting for taste | om smagen kan der ikke diskuteres |
| there's no place like home | ude godt, men hjemme bedst |
| thereafter | derpå |
| therefore | derfor |
| Theresienstadt concentration camp | Theresienstadt |
| therewith | dermed |
| Thermal camera | Kamera |
| thermal equipment | termisk del |
| thermal power plant | termisk kraftværk |
| Thermal value | Brændværdi |
| Thermoacoustic hot air engine | Termoakustisk varmluftmotor |
| Thermoacoustic refrigeration | Termoakustisk varmluftmotor |
| Thermodynamic cycle | Termodynamisk kredsproces |
| Thermodynamic process | Termodynamisk proces |
| Thermodynamic system | System |
| thermodynamics | termodynamik |
| Thermohaline circulation | Den termohaline cirkulation |
| thermometer | termometer |
| Thermopylae | Thermopylæ |
| Thermopyles | Thermopylæ |
| Thermos | Termoflaske |
| thermosphere | termosfære |
| thermostat | termostat |
| Therophyte | Énårig |
| thesaurus | begrebsordbog |
| these days | nu til dags |
| Theses on Feuerbach | Teser om Feuerbach |
| Theseus | Theseus |
| thesis | tese |
| Thessaloniki | Thessaloniki |
| Thessaloniki Prefecture | Thessaloniki |
| Thessaly | Thessaloniki |
| Theta | Theta |
| Thetis | Thetis |
| they | de |
| They Were Expendable | Operation helvede |
| Thiamine | Tiamin |
| Thibet | Tibet |
| thick | tæt |
| thick as a brick | dum som et bræt |
| thief | tyv |
| Thief of Time | Overspringshandling |
| Thierry Henry | Thierry Henry |
| thigh | lår |
| thighbone | lårben |
| thimble | fingerbøl |
| Thimphu | Thimphu |
| thin | tynd |
| Thin Lizzy | Thin Lizzy |
| Thin-film transistor | TFT |
| thing | ting |
| thingamabob | dims |
| think | synes om |
| Think carefully about | Anse |
| Think tank | Tænketank |
| think well of | agte |
| Thinking machine | Computer |
| third | tredje |
| Third Battle of Chattanooga | Slaget ved Chattanooga |
| Third Battle of Kharkov | Demjanskkedlen |
| Third generation computer | Tredjegenerationsdatamat |
| Third Italian War of Independence | Preussisk-østrigske krig |
| third person | tredje person |
| Third person or part | Tredie |
| Third Punic War | Tredje puniske krig |
| Third Reich | Tredje Rige |
| Third Republic | Tredje Republik |
| Third Servile War | Spartacus |
| third time's a charm | alle gode gange tre |
| Third World | Den tredje verden |
| Third-person shooter | Third-person shooter |
| thirdly | for det tredje |
| thirst | tørst |
| thirsty | tørstig |
| thirteen | tretten |
| thirteenth | trettende |
| thirty | tredive |
| Thirty Years' War | Trediveårskrigen |
| thirty-eight | otteogtredive |
| thirty-five | femogtredive |
| thirty-four | fireogtredive |
| thirty-nine | niogtredive |
| thirty-one | enogtredive |
| thirty-seven | syvogtredive |
| thirty-six | seksogtredive |
| thirty-three | treogtredive |
| thirty-two | toogtredive |
| this | dette |
| this afternoon | i eftermiddag |
| this evening | i aften |
| This Gun for Hire | Lejemord |
| This Is Spinal Tap | Spin̈al Tap |
| this morning | her til morgen |
| This side down | Lav |
| This way in | Bøn |
| This Woman Is Dangerous | Tilgivelse |
| Thisted | Thisted Kommune |
| Thisted FC | Thisted Fodbold Club |
| Thisted municipality | Thisted Kommune |
| thistle | tidsel |
| Thit Jensen | Thit Jensen |
| thither | did |
