K

Kappa ~ Water dweller that seeks to strangle. [3,8]

Professor Igor Karkaroff ~ Head of Durmstrang School. [4,15]

Karkus ~ Gurg for a while. [5,20]

Keeper ~ In Quidditch, the Keeper flies around the Hoops to stop the other team scoring. [1,10]

Dementors' Kiss ~ Their final weapon: excision of the soul. [3,12]

Kneazle ~ A cat-like creature with an uncanny ability to detect suspicious characters. They can interbreed with cats. [FB&wtft]

Knight Bus ~ A triple-decker omnibus, emergency transport for the stranded witch or wizard. [3,3]

Knockturn Alley ~ An undesirable area near Diagon Alley. [2,4]

Knut ~ A little bronze coin (493 to one Galleon, 29 to one Sickle). [1,5]

Kreacher ~ House Elf for the Black household. [5,4]

Viktor Krum ~ Star Quidditch player from Bulgaria. [4,5]

KwikSpell ~ A correspondence course in magic for beginners. [2,8]