Center letter: k
Outer letter: c d e n o u
Answers (45):
  uncocked
  uncooked
  undocked
  cock
  cocked
  coke
  conk
  conked
  cook
  cooked
  cuckoo
  cuckooed
  cuke
  deck
  decked
  deke
  deked
  dock
  docked
  duck
  ducked
  duke
  duked
  dunk
  dunked
  eked
  keen
  keened
  kendo
  keno
  knee
  kneed
  knock
  knocked
  kook
  kudu
  neck
  necked
  nock
  nocked
  nook
  nuke
  nuked
  uncock
  undock