Center letter: f
Outer letter: d e i l n u
Answers (78):
  nullified
  unfiled
  unfilled
  unfulfilled
  defend
  defended
  defied
  defile
  defiled
  define
  defined
  defund
  defunded
  deified
  duff
  duffel
  duffle
  edified
  elfin
  feed
  feel
  felid
  feline
  fell
  felled
  fend
  fended
  fennel
  feud
  feuded
  fiddle
  fiddled
  fief
  field
  fielded
  fiend
  fife
  fifed
  file
  filed
  fill
  filled
  find
  fine
  fined
  finned
  fled
  flee
  flied
  flue
  fluff
  fluffed
  fluid
  fuddle
  fuddled
  fuel
  fueled
  fulfill
  fulfilled
  full
  fund
  funded
  funnel
  funneled
  infidel
  infield
  infill
  infilled
  life
  lifeline
  luff
  luffed
  needful
  undefended
  undefined
  unfed
  unfunded
  unified