| Doppelpenetration | double penetration |
| Penetration | penetration |
| Defenestration | defenestration |
| Degeneration | degeneration |
| Doppelagentin | double agent |
| Doppelbestrafung | double jeopardy |
| doppelwertig | ambivalent |
| Doppelgängerin | double |
| Dieselgenerator | diesel generator |
| Regeneration | regeneration |
| Demonstration | demonstration |
| Konzentration | concentration |
| Konzelebration | concelebration |
| Perseveration | perseveration |
| Differentiation | differentiation |
| Dokumentation | documentation sign |
| Implementation | implementation |
| Doppelcicero | double pica |
| Doppelzentner | quintal |
| doppelgesichtig | two-faced |