Center letter: l
Outer letter: b e f i n u
Answers (53):
  bluefin
  unbelief
  beeline
  befell
  belie
  belief
  bell
  belle
  bible
  bile
  bill
  blin
  blini
  blue
  bluebell
  bluff
  bubble
  bulb
  bull
  elfin
  enfeeble
  feeble
  feel
  feline
  fell
  fennel
  file
  fill
  flee
  flub
  flue
  fluff
  fuel
  fulfill
  full
  funnel
  infill
  libel
  libelee
  lien
  lieu
  life
  lifeline
  line
  linen
  lube
  lull
  lulu
  lune
  nibble
  nubble
  nubile
  null