| kol- | co- |
| Kolk | scour |
| Kola | Kola Peninsula |
| Köln | Cologne |
| Kolik | colic |
| Kolja | Nick |
| Kollo | packing unit |
| Kolon | colon |
| Kolben | club mace piston butt spadix flask |
| Kollar | collar |
| Kolleg | college |
| Koloss | colossus |
| Kolter | doona |
| Kölner | Cologne inhabitant of Cologne native of Cologne |
| Kölsch | Kölsch Colognian |
| kölsch | Colonian |
| Kolchis | Colchis |
| Kolloid | colloid |
| Koloman | Colman |
| Kolonel | minion |