Center letter: g
Outer letter: h i n o p w
Answers (51):
  whooping
  whopping
  gigging
  ginning
  going
  gong
  gonging
  goon
  goop
  gown
  gowning
  high
  hinging
  hogging
  honing
  hooping
  hoping
  hopping
  inning
  nigh
  nipping
  noggin
  ongoing
  opining
  owing
  owning
  phoning
  pigging
  ping
  pinging
  pining
  pinioning
  pinning
  piping
  pogo
  pogoing
  pong
  pooping
  popping
  whinging
  whining
  whipping
  wigging
  wing
  winging
  wining
  winning
  winnowing
  wiping
  wooing
  wowing