| Theorie von Allem | theory of everything |
| Orientale | Oriental |
| horizontal | horizontal |
| Betriebsunfall | workplace accident |
| Serienkiller | serial killer |
| freie Variable | free variable |
| See von Galiläa | Sea of Galilee |
| Horn von Afrika | Horn of Africa |
| alles in allem | all in all |
| vor allem | above all chiefly particularly first of all pre-eminently |
| Touristenfalle | tourist trap |
| Telefonzelle | telephone booth telephone box |
| Theogonie | theogony |
| Thermografie | thermography |
| Theorem | theorem |
| Theoretiker | theorist theoretician theorizer |
| Theorie | theory |
| Thermalquelle | hot spring |
| Thermoskanne | thermos |
| thermonuklear | thermonuclear |