Center letter: n
Outer letter: o p x e h i
Answers (26):
  phoenix
  heinie
  hone
  innie
  nene
  neon
  nine
  ninepin
  none
  noon
  nope
  onion
  open
  opine
  opinion
  oxen
  peen
  penne
  peon
  phone
  phono
  pine
  pinion
  pippin
  pone
  xenon