Center letter: c
Outer letter: a b e k l p
Answers (36):
  packable
  aback
  alack
  alpaca
  apace
  back
  backpack
  beck
  black
  blackball
  blackcap
  cabal
  cabala
  cable
  cackle
  cake
  call
  calla
  callable
  callback
  capable
  cape
  celeb
  cell
  clack
  clap
  clapback
  lace
  lack
  pace
  pack
  palace
  peace
  peaceable
  peck
  place