| Kauf-Nix-Tag | Buy Nothing Day |
| Karfreitag | Good Friday |
| Kaufvertrag | contract for sale contract of sale purchase agreement |
| Kausalität | causality |
| auf den Tag | to the day |
| aufrichtig | sincere honest candid cordial cordially sincerely |
| Karsonntag | Passion Sunday |
| Stefanitag | St. Stephen's Day |
| Maifeiertag | May Day |
| Kauffrau | grocer businesswoman |
| Kaufmanns-Und | ampersand |
| Käuferin | buyer |
| Kauffahrtei | merchant shipping |
| Kaufkraft | spending power purchasing power |
| Kaufsucht | shopaholism shopping addiction |
| Kaunas | Kaunas |
| kaufen | buy purchase |
| käuflich | buyable purchasable bribable |
| Aufleitung | antiderivative |
| Aufreihung | alignment |