| Kausativ | causative |
| Kaustik | caustic |
| Akkusativ | accusative accusative case |
| kausal | causal |
| Austin | Austin |
| Bausatz | kit |
| Baustil | architectural style building style |
| Kassation | cassation abrogation quashing reversal annulment military degradation |
| ipsativ | ipsative |
| kiesätig | choosy finicky picky malcontent discontent discontented displeased dissatisfied grouchy |
| Äquativ | equative |
| Ablativ | ablative ablative case |
| Allativ | allative case |
| Laudatio | eulogy encomium laudation laudatory speech panegyric |
| karitativ | charitable caritative |
| katenativ | catenative |
| koedukativ | coeducational |
| konativ | conative |
| kreativ | creative |
| kumulativ | cumulative |