Center letter: f
Outer letter: a b i l n y
Answers (25):
  infallibly
  affably
  alfalfa
  bailiff
  biff
  fail
  fall
  fallibly
  fanny
  filial
  filially
  fill
  filly
  final
  finally
  finial
  flab
  flabby
  flail
  flan
  flay
  flyby
  iffy
  infill
  naif