| Reduzierer | reducer |
| reduzieren | reduce decrease |
| reduziert | choke |
| deduzieren | deduce |
| Reduzierung | bushing abridgement |
| redigieren | edit redact |
| abduzieren | abduct abduce |
| induzieren | induce |
| kaduzieren | cancel |
| produzieren | produce make make an exhibition of oneself show off |
| dedizieren | dedicate |
| radizieren | square root |
| revozieren | revoke |
| Radierer | eraser |
| Rekrutierer | recruiter |
| refutieren | refute |
| refüsieren | refuse |
| regulieren | regulate set |
| resümieren | sum up |
| Reduzent | decomposer |