Center letter: e
Outer letter: b f l o t u
Answers (54):
  bottleful
  beef
  beet
  beetle
  befell
  befoul
  bell
  belle
  belt
  betel
  blue
  bluebell
  bluebottle
  bobble
  bootee
  bottle
  boule
  bubble
  buffet
  bullet
  butte
  effete
  etouffee
  feeble
  feel
  feet
  fell
  felt
  fete
  fettle
  flee
  fleet
  floe
  flue
  flute
  fuel
  left
  lobe
  lube
  lute
  oboe
  oleo
  outlet
  teff
  tell
  toffee
  tootle
  tote
  tube
  tubeful
  tubule
  tuffet
  tulle
  tutee