| Reduktion | reduction |
| Redaktion | editing |
| Deduktion | deduction |
| Seduktion | seduction |
| Reduktionsofen | reduction furnace |
| Abduktion | abduction abductive reasoning |
| Induktion | induction electromagnetic induction mathematical induction |
| Obduktion | autopsy postmortem post mortem postmortem examination |
| Produktion | production |
| Reaktion | reaction |
| Rektion | case government government |
| Resektion | resection |
| deduktiv | deductive |
| Koedukation | coeducation |
| Konduktion | conduction |
| Reproduktion | reproduction |
| Auktion | auction |
| Dejektion | dejecta |
| Reflektion | reflection |
| Diktion | diction |