| Konfektion | make manufacture ready-to-wear off-the-peg clothing off-the-rack clothing clothing industry |
| Konduktion | conduction |
| Konfession | denomination |
| Konvention | convention |
| Konzeption | conception |
| konfektionieren | accomplish sew |
| Infektion | infection |
| Kollektion | collection |
| Konfekt | candy |
| Konkretion | concretion |
| Konsekration | dedication |
| Konsumtion | consumption |
| Kondition | condition |
| Konfetti | confetti |
| Konfiskation | confiscation |
| Konfusion | bewilderment |
| Konjunktion | conjunction |
| Kontraktion | contraction |
| Konversion | conversion |
| Konvokation | convocation |