| kooperativ | cooperative |
| Kooperative | cooperative |
| unkooperativ | intransigent |
| Kooperation | cooperation co-operation |
| operativ | surgical operative operational strategic |
| Komparativ | comparative |
| postoperativ | postoperative |
| präoperativ | preoperative |
| Imperativ | imperative |
| imperativ | imperative |
| konspirativ | conspirative |
| komputativ | computational computative |
| konservativ | conservative tory |
| kompetitiv | competitive |
| Kooptation | co-optation co-option |
| Operation | surgery operation |
| Operator | operator administrator |
| perioperativ | perioperative |
| Körperteil | body part |
| Superlativ | superlative |