Center letter: a
Outer letter: e h n o p y
Answers (29):
  payphone
  aeon
  ahoy
  annoy
  anon
  anyhoo
  anyone
  apnea
  happen
  happy
  heap
  henna
  hyena
  naan
  nana
  nanny
  nape
  neap
  paean
  pane
  papa
  papaya
  pappy
  payee
  peahen
  poppa
  yahoo
  yappy
  yeah