| deka- | deca- |
| Dekan | dean |
| Dekade | decade group of ten period of ten days period of ten weeks period of ten months decennium |
| Dekkan | Deccan |
| Dekor | decor |
| Dekaeder | decahedron |
| Dekanin | dean |
| Dekalog | Decalogue Ten Commandments |
| Dekokt | decoction |
| Dekret | decree |
| Dekurs | decursus morbi |
| Hekabe | Hecuba |
| Pekari | peccary |
| prekär | precarious tricky uneasy awkward embarrassing parlous really difficult |
| Mokka- | mocha |
| Dekanter | decanter |
| Dekadenz | decadence degeneracy degeneration |
| Dekorum | decorum |
| dekadent | decadent |
| Rijeka | Rijeka |