Center letter: f
Outer letter: a g i l n p
Answers (35):
  flapping
  alfalfa
  fail
  failing
  fall
  falling
  fang
  fanning
  fifing
  filial
  filing
  fill
  filling
  fillip
  finagling
  final
  finial
  fining
  flag
  flagging
  flail
  flailing
  flan
  flanging
  flap
  fling
  flinging
  flip
  flipping
  gaff
  infill
  infilling
  naif
  piffling
  pilaf