| kollegial | collegial |
| Kollegin | colleague |
| Kollegium | collegium |
| kolloidal | colloidal |
| kolonial | colonial |
| Kolleg | college |
| Kollege | colleague workmate co-worker |
| Killerwal | killer whale |
| illegal | illegal illicit clandestine |
| kongenial | congenial |
| Kollektor | collector |
| Kolloid | colloid |
| Kolluvium | colluvium |
| kollern | gobble |
| kollinear | collinear |
| Kollagen | collagen |
| Kollar | collar |
| Kollation | collating collation |
| Kollekte | offertory |
| Kollektion | collection |