| Kolkrabe | common raven |
| Aalkrähe | cormorant |
| Kohlrabi | kohlrabi German turnip |
| Kolk | scour |
| Koloman | Colman |
| Kolubrine | culverin |
| Kola | Kola Peninsula |
| Kolabaum | kola kola nut tree |
| Kolben | club mace piston butt spadix flask |
| Kolja | Nick |
| Kollagen | collagen |
| Kollaps | collapse fainting syncope |
| Kollar | collar |
| Kollege | colleague workmate co-worker |
| Kollekte | offertory |
| Kolonie | colony |
| Kolonnade | colonnade |
| Kolonne | convoy fractionating column |
| Koloratur | coloratura |
| Kolumne | column |