Center letter: c
Outer letter: a b k m o r
Answers (42):
  backroom
  aback
  arco
  back
  backcomb
  barback
  barbacoa
  barrack
  bock
  bookrack
  cacao
  camo
  carb
  carob
  carom
  cobra
  coca
  cock
  cocoa
  coma
  comb
  combo
  comma
  cook
  cookbook
  cork
  crab
  crack
  cram
  croak
  croc
  crock
  crook
  macro
  maraca
  mock
  morocco
  orca
  rack
  rock
  rococo
  romcom