| Thermit | thermite |
| Thermik | thermal |
| Theremin | theremin |
| Therme | thermal bath thermal spring |
| thermal | thermal |
| Termin | deadline time limit date |
| Termite | termite |
| hiermit | hereby |
| Theme | theme |
| Theresia | Teresa |
| Thermidor | Thermidor |
| Theron | Theron |
| Thetis | Thetis |
| witherit | witherite |
| Ethernet | Ethernet |
| Theia | Theia |
| Theist | theist |
| Thema | theme topic subject |
| Themse | Thames |
| Theorie | theory |