Center letter: p
Outer letter: h i l n o y
Answers (38):
  phonily
  hiply
  hippo
  hippy
  hoop
  hoppy
  hypo
  lipo
  lippy
  lollipop
  lollop
  loop
  loopily
  loopy
  nippy
  opinion
  phono
  phony
  phyllo
  pill
  pillion
  pinion
  pinny
  pippin
  plop
  ploy
  polio
  poll
  polo
  polyp
  polyphony
  pony
  pooh
  pool
  poop
  poplin
  poppy
  pylon