| Thermik | thermal |
| Thermit | thermite |
| Theremin | theremin |
| Theriak | antidote |
| Therme | thermal bath thermal spring |
| thermal | thermal |
| Termin | deadline time limit date |
| Theme | theme |
| Theresia | Teresa |
| Thermidor | Thermidor |
| Theron | Theron |
| Thetis | Thetis |
| Geothermik | geothermics |
| Theia | Theia |
| Thema | theme topic subject |
| Themse | Thames |
| Theorie | theory |
| Therapie | therapy |
| Theresa | Teresa |
| thermisch | thermal |