| Katheder | lectern |
| Katheter | catheter |
| Katharer | Cathar |
| Kathete | cathetus |
| Kathode | cathode |
| Athener | Athenian |
| Kathole | papist |
| Katarer | Qatari |
| Kataster | land register cadastre |
| Kater | tomcat cat tom hangover |
| Athene | Athena |
| Äther | ether aether |
| Cheder | cheder |
| Hutfeder | plume |
| Keder | edge grommet grommet edging profiled joint weather strip weatherstrip |
| Rotfeder | rudd |
| Saufeder | boar spear |
| entweder | either |
| Fahnder | investigator searcher |
| Kader | cadre |