| Katarakt | cataract |
| Kataphrakt | cataphract |
| Katarr | catarrh |
| Katafalk | catafalque |
| Katakana | katakana |
| Katalane | Catalan |
| Katana | katana |
| Katapult | catapult |
| Katar | Qatar |
| Katarer | Qatari |
| Katarrh | catarrh |
| Karait | Karaite |
| Amarant | amaranth firefinch |
| Ararat | Ararat |
| Karat | carat karat |
| Kontrakt | compact contract |
| Extrakt | essence extract abstract gist |
| Trakt | suite tract |
| Harakat | harakat |
| Katanga | Katanga |