| Konstruktion | construction |
| Konstruktor | constructor |
| Kontraktion | contraction |
| Rekonstruktion | reconstruction |
| konstruktiv | design constructive |
| Obstruktion | obstruction |
| Konduktion | conduction |
| Konsumtion | consumption |
| Konstitution | constitution |
| Konstrukteur | designer constructer constructor |
| Menstruation | menstruation |
| Konkretion | concretion |
| Konsekration | dedication |
| Konspiration | conspiracy |
| Konsultation | consultation |
| Konurbation | conurbation |
| Nachkonstruktion | reverse engineering |
| Dachkonstruktion | roof construction roof structure |
| Holzkonstruktion | wood construction |
| Konfektion | make manufacture ready-to-wear off-the-peg clothing off-the-rack clothing clothing industry |