Center letter: p
Outer letter: a c i m n o
Answers (31):
  companion
  apian
  camp
  campo
  canopic
  capo
  capon
  cioppino
  comp
  coop
  minicamp
  nincompoop
  opinion
  pain
  pampa
  panama
  panic
  panini
  papa
  piano
  pica
  picnic
  pimp
  pinion
  pippin
  poinciana
  pomp
  pompano
  pompom
  poop
  poppa