Center letter: p
Outer letter: a c n o t u
Answers (30):
  occupant
  atop
  capo
  capon
  catnap
  coop
  coopt
  copout
  coup
  coupon
  cuppa
  cutup
  output
  pact
  pant
  papa
  pontoon
  poop
  poppa
  potato
  pout
  punt
  pupa
  putout
  putt
  tapa
  topcoat
  unapt
  uncap
  upon