| Kollege | colleague workmate co-worker |
| Kolleg | college |
| College | college |
| kollern | gobble |
| Kollagen | collagen |
| Kollegin | colleague |
| Kollekte | offertory |
| Collage | mosaic collage |
| Kolloid | colloid |
| kollegial | collegial |
| Kolben | club mace piston butt spadix flask |
| Kollaps | collapse fainting syncope |
| Kollar | collar |
| Kollegium | collegium |
| Kollo | packing unit |
| Kolonie | colony |
| Kolonne | convoy fractionating column |
| Kolter | doona |
| Kolumne | column |
| Kölner | Cologne inhabitant of Cologne native of Cologne |