| theory | teori |
| theory of chances | sannolikhetskalkyl |
| Theory of cognition | Kunskapsteori |
| theory of combinations | kombinationslära |
| theory of equations | ekvationsteori |
| theory of evolution | utvecklingslära |
| Theory of forms | Idévärld |
| theory of gravitation | gravitationsteori |
| Theory of justification | Rättfärdiggörelse |
| Theory of literature | Teori |
| theory of probability | sannolikhetskalkyl |
| theory of relativity | relativitetsteori |
| Theory of special relativity | Speciella relativitetsteorin |
| theosophic | teosofisk |
| theosophy | teosofi |
| Theotokos | Guds moder |
| therapeutic | terapeutisk |
| therapeutics | terapi |
| therapist | terapeut |
| therapy | behandling |
| Theravada | Theravada |
| there | där |
| there are | det är |
| there be | finnas |
| there is | det är |
| there is an exception to every rule | ingen regel utan undantag |
| There Is Nothing Left to Lose | There Is Nothing Left to Lose |
| there is nothing new under the sun | inget nytt under solen |
| there's | det är |
| there's no accounting for taste | smaken är som baken |
| there's no place like home | borta bra men hemma bäst |
| there, there | såja, såja |
| thereabout | så |
| thereabouts | så |
| thereafter | därefter |
| thereagainst | därmot |
| thereat | däråt |
| thereby | därvid |
| therefore | följaktligen |
| therefrom | därav |
| therein | däri |
| thereinafter | därnedan |
| theremin | theremin |
| thereof | därav |
| thereon | därpå |
| Therese Borssén | Therese Borssén |
| Therese Grankvist | Therese Grankvist |
| Therese of Saxe-Hildburghausen | Therese av Sachsen-Hildburghausen |
| Theresienstadt concentration camp | Theresienstadt |
| thereto | därtill |
| theretofore | dittills |
| thereunder | därunder |
| thereunto | därtill |
| thereupon | följaktligen |
| therewith | därmed |
| therewithal | därmed |
| Theria | Theria |
| thermal | värme- |
| Thermal camera | Kamera |
| Thermal depolymerization | Termisk depolymerisation |
| Thermal Design Power | Thermal Design Power |
| thermal equipment | termisk utrustning |
| thermal power plant | värmekraftanläggning |
| Thermal value | Förbränningsvärme |
| Thermal wind | Termisk vind |
| thermionic tube | glödkatodrör |
| Thermodynamic cycle | Termodynamisk cykel |
| Thermodynamic free energy | Helmholtz fria energi |
| Thermodynamic system | System |
| thermodynamics | termodynamik |
| Thermohaline circulation | Termohalin cirkulation |
| thermometer | termometer |
| thermonuclear | termonukleär |
| thermonuclear weapon | termonukleärt vapen |
| thermoplastic | termoplastisk |
| Thermopylae | Thermopyle |
| Thermopyles | Thermopyle |
| thermos | termos |
| thermos flask | termos |
| thermosetting | härdbar |
| thermosphere | termosfär |
| thermostat | termostat |
| thermostate | termostat |
| Theron of Acragas | Theron |
| Theropoda | Theropoder |
| Thersites | Thersites |
| Therwil | Therwil |
| thesaurus | uppslagsbok |
| these | de här |
| Theseus | Theseus |
| thesis | avhandling |
| thespian | dramatisk |
| Thespis | Thespis |
| Thesprotia | Thesprotia |
| Thessalia | Thessalien |
| Thessalonian | thessaloniker |
| Thessaloniki | Thessaloniki |
| Thessaloniki Metro | Thessalonikis tunnelbana |
| Thessaloniki Prefecture | Thessaloniki |
| Thessaly | Thessalien |
| Thestral | Testral |
| Theta | Theta |
| Theta Cassiopeiae | Marfark |
| Thetan | Thetan |
| Thetis | Thetis |
| Theudebald | Theodebald I |
| Theudebert I | Theodebert I |
| Theudebert II | Theodebert II |
| Theuderic I | Theoderik I av Austrasien |
| Theuderic II | Theoderik II av Burgund |
| Theuderic III | Theoderik III |
| Theuderic IV | Theoderik IV |
| Theudimer | Theodimir |
| Theudoald | Theodebald I |
| thews | muskler |
| thewy | senig |
| they | de |
| They All Laughed | They All Laughed |
| They Do It with Mirrors | Trick med speglar |
| they're | de är |
| they've | de har |
| Theys Eluay | Theys Hiyo Eluay |
| Thiago Motta | Thiago Motta |
| Thiamine | Tiamin |
| Thibet | Tibet |
| Thich Quang Duc | Thích Quảng Đức |
| thick | tjock |
