| Rekuperation | recuperation |
| Regeneration | regeneration |
| Reparation | reparation |
| Reklamation | complaint consumer complaint customer complaint claim |
| Rekursion | recursion |
| rekuperieren | recycle |
| Okkupation | occupation |
| Herzoperation | heart surgery |
| Kooperation | cooperation co-operation |
| Operation | surgery operation |
| Perspiration | perspiration |
| Degeneration | degeneration |
| Generation | generation |
| Dekorporation | decorporation |
| Lukubration | lucubration |
| Deklaration | declaration |
| Dekoration | decoration |
| Exspiration | exhalation expiration |
| Kuration | cure |
| Restauration | restoration |