funk
Keep and kelp are four letter words starting with K and ending with P.
talk
knot
backtrack
asterisk
There are no words that match those letters, here are all the 4-letter Q words:QadiQaidQatsQophQuadQuagQuaiQuayQueyQuidQuinQuipQuitQuizQuod
alkylketalkevelkneelknellknollknurlkraalkrillskillskirlskullvakilyokel
amuck
king
squawkstreak
duck
There are no four letter words that begin with k and include the letter z.