| Kolluvium | colluvium |
| Kollegium | collegium |
| Kollodium | collodion |
| Kollyrium | collyrium |
| Alluvium | Holocene |
| Kolloquium | colloquium examination symposium test |
| Kollusion | collusion |
| Pollinium | pollinium |
| Effluvium | effluvium |
| Callovium | Callovian |
| Kolloid | colloid |
| Kolosseum | Colosseum |
| Kolumbus | Columbus |
| kollegial | collegial |
| Kolabaum | kola kola nut tree |
| Kollation | collating collation |
| Kollegin | colleague |
| Kollektivum | collective noun |
| Kollision | collision |
| Kolostrum | colostrum beestings foremilk |