| deklinabel | declinable |
| indeklinabel | indeclinable undeclinable |
| Deklination | declension declination |
| deklinieren | decline |
| Klingel | bell |
| abominabel | abominable atrocious horrible |
| Edelknabe | squire |
| Inkunabel | incunabulum incunable |
| delektabel | delicious |
| veritabel | veritable |
| Deibel | deuce |
| Dezibel | decibel |
| Dekaeder | decahedron |
| Dekanter | decanter |
| Deklarant | declarant |
| deklinierbar | declinable |
| Dekade | decade group of ten period of ten days period of ten weeks period of ten months decennium |
| deklarativ | declarative |
| Eklipse | eclipse |
| Reklame | advertisement |