| Therapie | therapy |
| therapieren | treat |
| Gentherapie | gene therapy |
| Theresia | Teresa |
| Theokratie | theocracy |
| Theorie | theory |
| Therapeut | therapist |
| Theremin | theremin |
| Therme | thermal bath thermal spring |
| Thermik | thermal |
| Thermit | thermite |
| Hernie | hernia |
| Geranie | geranium |
| Satrapie | satrapy |
| Scrapie | scrapie |
| Trappe | bustard |
| Ergotherapie | occupational therapy |
| Theme | theme |
| Theogonie | theogony |
| Theorbe | theorbo |