Center letter: a
Outer letter: c j k o p t
Answers (25):
  jackpot
  atop
  attack
  cacao
  capo
  coat
  coca
  cockapoo
  cockatoo
  cocoa
  jack
  kapok
  kappa
  pack
  pact
  papa
  poppa
  potato
  tack
  taco
  tact
  tapa
  tattoo
  toccata
  topcoat