Center letter: c
Outer letter: a k l o r w
Answers (49):
  warlock
  alack
  arco
  cacao
  call
  calla
  callaloo
  callow
  carol
  clack
  claw
  cloaca
  cloak
  clock
  clockwork
  coal
  coca
  cock
  cocoa
  cola
  collar
  color
  cook
  cool
  coral
  cork
  corolla
  corral
  cowl
  crack
  craw
  crawl
  croak
  croc
  crock
  crook
  crow
  lack
  local
  lock
  loco
  oarlock
  orca
  rack
  rock
  rococo
  wack
  wacko
  wrack