Kent-Rosanoff List -
This is a list of words for use in free association which the authors have thoroughly tested and analysed, especially  the frequency of various responses. Thus the results of a free association session with the words on the list can be compared against previous results (taken from people in different known psychological states). Not normally used in hypnotherapy but may have some application in hypnoanalysis.
Kinaesthetic Memory - 
Physical memory, of bodily states, positions, movements and sensations. Used frequently in hypnosis, especially during induction when bodily states are evoked by suggestion.
Kleptomania - 
A kleptomaniac experiences an obsessive compulsion to steal. 
Korsakoff's Syndrome - 
Refers to the impairment of memory, usually due to alchohol abuse.