| Katzentür | cat flap |
| Katzenauge | cat's eye |
| Katheter | catheter |
| Katzenhai | cat shark catshark dogfish |
| Katzenklo | cat litter pan litter pan |
| Agentur | agency news agency |
| Wagentür | car door |
| Kattun | calico |
| Katzenbaby | kitten |
| Katzencafé | cat café |
| Katzenkopf | cobblestone |
| Katzensitter | catsitter |
| Katzenstreu | kitty litter |
| Katzenvieh | moggy |
| Katzenwels | catfish |
| Katzerl | kitten |
| katzenartig | feline |
| katzenhaft | catlike |
| Karikatur | caricature burlesque cartoon |
| Kataster | land register cadastre |