| Dekaeder | decahedron |
| Dekade | decade group of ten period of ten days period of ten weeks period of ten months decennium |
| Dekanter | decanter |
| Dekadenz | decadence degeneracy degeneration |
| Dodekaeder | dodecahedron |
| dekadent | decadent |
| Akkader | Akkadian |
| Kader | cadre |
| Geäder | vein |
| Header | header |
| Hexaeder | hexahedron cube |
| Leader | leader |
| Dekameron | Decameron |
| Dekanin | dean |
| Dekalog | Decalogue Ten Commandments |
| Dekameter | decameter decametre |
| Dekan | dean |
| Dekor | decor |
| Dekret | decree |
| deka- | deca- |