Center letter: i
Outer letter: b e f l n x
Answers (32):
  inflexible
  beeline
  belie
  belief
  bible
  biff
  bile
  bill
  blin
  blini
  elfin
  exile
  feline
  fief
  fife
  file
  fill
  fine
  flexible
  ibex
  infill
  infix
  innie
  libel
  libelee
  lien
  life
  lifeline
  line
  linen
  nibble
  nine