Well there are quite a few I'd imagine, here are the ones I can think of:
knuckle
keyhole
keyhole
Barrack: location for housing soldiers.
keyhole, knuckle
keyhole, keynote or knuckle.
funk
backtrack
asterisk
Barrack is a seven lettered word that begins with B and ends with K. A barrack usually refers to a form of military housing.
alkylketalkevelkneelknellknollknurlkraalkrillskillskirlskullvakilyokel
amuck