| Tektonik | tectonics |
| Teutonin | Teuton |
| Tektit | tektite |
| Geotektonik | tectonics |
| tektonisch | tectonic |
| -ektomie | -ectomy |
| Lektorin | lecturer |
| Ektenie | ectenia ektenia |
| Elektronik | electronics electronic circuit |
| Hektik | hecticness |
| Nekton | nekton |
| Rektorin | headmistress |
| Bentonit | bentonite |
| Betonie | betony purple betony |
| Teutone | Teuton Kraut German Prussian swine |
| Takonit | taconite |
| Beatnik | beatnik |
| Technik | technique technology equipment |
| Tekkno | techno |
| Hektor | Hector |