Center letter: p
Outer letter: x e h i n o
Answers (27):
  phoenix
  epee
  expo
  hippie
  hippo
  hoop
  hope
  ninepin
  nope
  open
  opine
  opinion
  peen
  peep
  penne
  peon
  phone
  phono
  pine
  pinion
  pipe
  pippin
  pixie
  pone
  pooh
  poop
  pope