Center letter: u
Outer letter: a c e f l t
Answers (42):
  effectual
  fluctuate
  actual
  actuate
  acute
  calculate
  caul
  cellule
  clue
  cuff
  cull
  cult
  cute
  cutlet
  cuttle
  effectuate
  factual
  fateful
  faucet
  fault
  flauta
  flue
  fluff
  flute
  fuel
  full
  lettuce
  luau
  luff
  lull
  lulu
  lute
  luteal
  tactful
  tactual
  taut
  tuffet
  tuft
  tulle
  tutee
  tutu
  ululate