| Korrelation | correlation association |
| Korrelat | dummy element |
| Korruption | corruption |
| Relation | relation |
| Koagulation | coagulation |
| Kollation | collating collation |
| Kopulation | copulation |
| Kreation | creation |
| Kremation | cremation |
| Kooperation | cooperation co-operation |
| Korrektor | proofreader |
| Korrepetitor | repetiteur répétiteur |
| Korrosion | corrosion |
| korrektiv | corrective |
| korrelieren | correlate |
| Perkolation | percolation |
| Kalkulation | calculation costing |
| Konstellation | constellation |
| Kontemplation | contemplation |
| Modulation | modulation |