| Koordination | coordination |
| Koordinator | coordinator |
| Ordination | ordination |
| Koordinatorin | coordinator |
| Koordinate | coordinate |
| Kombination | combination |
| Kooperation | cooperation co-operation |
| Kooptation | co-optation co-option |
| koordinieren | coordinate |
| Kontamination | amalgam blending |
| Obstination | obstinacy obstination |
| Koedukation | coeducation |
| Kolligation | colligation |
| Kondensation | condensation |
| Konspiration | conspiracy |
| Kodifikation | codification |
| Kohabitation | cohabitation |
| Kolonisation | colonisation |
| Komplikation | complication |
| Korrelation | correlation association |