Center letter: i
Outer letter: a f g n u w
Answers (35):
  guffawing
  again
  aging
  angina
  awing
  awning
  fanning
  fawning
  fifing
  fining
  fungi
  gagging
  gain
  gaining
  ganging
  gauging
  gigging
  ginning
  gnawing
  gunning
  iguana
  inning
  nagging
  naif
  wagging
  waging
  waif
  waning
  wigging
  wigwag
  wigwagging
  wing
  winging
  wining
  winning