| Kaution | bail deposit |
| Kation | cation |
| -ation | -ation |
| Action | action |
| Aktion | action operation promotion campaign |
| Auktion | auction |
| Bastion | bastion |
| Nation | nation |
| Ration | ration |
| Kauen | Kaunas |
| kauen | chew masticate |
| Kaustik | caustic |
| Kaufoption | call option purchase option |
| Kautel | proviso |
| kauern | be huddled somewhere crouch |
| kaufen | buy purchase |
| auto- | self- auto- |
| läutern | purge |
| Autist | autist autistic person |
| Auto | car motor car auto order resolution writ |