| Konkretion | concretion |
| Konduktion | conduction |
| Konsekration | dedication |
| Konsumtion | consumption |
| Konurbation | conurbation |
| Kondition | condition |
| Konfektion | make manufacture ready-to-wear off-the-peg clothing off-the-rack clothing clothing industry |
| Konklusion | conclusion |
| Konkretum | concrete noun |
| Konkussion | concussion |
| Kontraktion | contraction |
| Konvention | convention |
| Konzeption | conception |
| konkret | concrete |
| Pankration | pankration |
| Exkretion | excretion |
| Akkretion | accretion |
| Diskretion | discretion |
| Sekretion | secretion |
| Konkatenation | concatenation |