| Kollegin | colleague |
| kollegial | collegial |
| kollern | gobble |
| Kollagen | collagen |
| Kolleg | college |
| Kollege | colleague workmate co-worker |
| Kollegium | collegium |
| Killerin | hitman |
| Kolloid | colloid |
| Ökologin | ecologist |
| Kolben | club mace piston butt spadix flask |
| Kollation | collating collation |
| Kollekte | offertory |
| Kollektion | collection |
| Kollektiv | collective |
| kollektiv | collective |
| Kollision | collision |
| Kollusion | collusion |
| Bollern | thud |
| bollern | thud |
| böllern | fire fire a salut |