Center letter: o
Outer letter: e h i l n p
Answers (60):
  oenophile
  pinhole
  elope
  hellhole
  hellion
  hello
  hippo
  hole
  hone
  hoop
  hoopoe
  hope
  leonine
  lion
  lipo
  loin
  loll
  lollipop
  lollop
  lone
  loon
  loonie
  loop
  loophole
  lope
  neon
  noel
  none
  nonillion
  noon
  nope
  oleo
  olio
  ollie
  onion
  online
  open
  opine
  opinion
  peephole
  peon
  people
  phenol
  phone
  phono
  piehole
  pillion
  pinion
  plop
  pole
  polio
  poll
  pollen
  polo
  pone
  pooh
  pool
  poop
  pope
  poplin