| konvulsiv | convulsive |
| Konvulsion | convulsion |
| kompulsiv | compulsive |
| konzessiv | concessive |
| Konfutse | Confucius |
| Konvertit | convert |
| konfus | confused |
| konfuse | confuse |
| konjunktiv | conjunctive |
| Konjunktiv | subjunctive conjunctive mood conjunctive conjunctive mode |
| Konfusion | bewilderment |
| Kongolesin | Congolese |
| Konkurs | bankruptcy |
| Konkussion | concussion |
| Konsul | consul |
| Konsulat | consulate |
| Konversion | conversion |
| Konvoi | convoy |
| Konvolut | envelope |
| konativ | conative |