| Koadjutor | coadjutor |
| Koautor | coauthor |
| Konautor | coauthor |
| Konditor | confectioner |
| Koautorin | coauthor |
| Roadster | roadster |
| Kajüte | cabin |
| Kabuto | kabuto |
| Romanautor | novelist |
| Autor | author literator |
| Kollektor | collector |
| Kontor | office |
| Korrektor | proofreader |
| Adduktor | adductor |
| Gladiator | gladiator |
| Kantor | cantor |
| Kreditor | creditor |
| Prädator | predator |
| Prädiktor | predictor |
| Radiator | radiator |