Center letter: f
Outer letter: b e l o t u
Answers (39):
  bottleful
  beef
  befell
  befoul
  bluff
  boffo
  buff
  buffet
  effete
  etouffee
  feeble
  feel
  feet
  fell
  felt
  fete
  fettle
  flee
  fleet
  floe
  flout
  flub
  flue
  fluff
  flute
  fool
  foot
  foul
  fuel
  full
  left
  loft
  teff
  toffee
  tofu
  tubeful
  tubful
  tuffet
  tuft