Center letter: k
Outer letter: a d e f l n
Answers (34):
  flanked
  ankle
  dank
  deke
  deked
  eked
  fake
  faked
  flak
  flake
  flaked
  flank
  kale
  keel
  keeled
  keen
  keened
  kennel
  kenneled
  knead
  kneaded
  knee
  kneed
  kneel
  kneeled
  knell
  knelled
  lake
  lank
  leak
  leaked
  leek
  naked
  nankeen