Center letter: a
Outer letter: f l m o r u
Answers (51):
  formula
  afar
  afoul
  afro
  alarm
  alfalfa
  aloof
  alum
  ammo
  amoral
  amour
  armful
  armor
  aroma
  arum
  aura
  aural
  aurora
  auroral
  fall
  falloff
  farm
  farro
  flora
  floral
  foal
  foam
  fora
  formal
  lama
  llama
  loaf
  loam
  loofa
  luau
  mall
  mama
  mamma
  mammal
  marm
  maul
  molar
  momma
  moola
  moral
  mural
  offal
  oral
  roam
  roar
  rural