| Kohabitation | cohabitation |
| Kapazitation | capacitation |
| Kavitation | cavitation |
| Kombination | combination |
| Habilitation | habilitation |
| Rehabilitation | rehabilitation exonoration |
| Agitation | agitation |
| Dekapitation | decapitation |
| Gravitation | gravity gravitation |
| Konsultation | consultation |
| Koadaptation | coadaptation |
| Kommutation | substitution test |
| Konnotation | connotation |
| Kooptation | co-optation co-option |
| Kollaboration | collaboration |
| Kolligation | colligation |
| Konspiration | conspiracy |
| Lokalisation | localization |
| Kanalisation | sewage system |
| Koagulation | coagulation |