| Kathodenstrahlröhre | cathode ray tube |
| Zahlenstrahl | number line |
| Totenstarre | rigor mortis |
| Strahlrohr | water cannon |
| Kathstrauch | khat |
| Kathedrale | cathedral |
| Xanthogensäure | xanthic acid xanthogenic acid |
| Bodenstanduhr | grandfather clock |
| Todesstrafe | death penalty capital punishment |
| Behördensprache | bureaucratese |
| Kohlenstoffnanoröhre | carbon nanotube |
| Neutronenstrahlung | neutron radiation |
| Tintenstrahldrucker | inkjet printer |
| Zitronenstrauch | lemon verbena |
| Kardinalzahlwort | cardinal numeral |
| Kategorientheorie | category theory |
| Katholische Kirche | Catholic Church |
| Kationenaustausch | cation exchange |
| Katzenstreu | kitty litter |
| Katastrophe | catastrophe calamity disaster |