Center letter: k
Outer letter: b c d e l o
Answers (38):
  blocked
  beck
  bedeck
  bedecked
  block
  bloke
  bock
  book
  booked
  cellblock
  clock
  clocked
  cock
  cocked
  cockle
  coke
  coldcock
  coldcocked
  cook
  cookbook
  cooked
  deck
  decked
  deckle
  deke
  deked
  dock
  docked
  eked
  keel
  keeled
  kook
  leek
  lock
  locked
  look
  lookbook
  looked