Center letter: l
Outer letter: d e n o u v
Answers (59):
  unevolved
  unloved
  dell
  delude
  deluded
  delve
  delved
  devolve
  devolved
  dole
  doled
  doll
  dolled
  doodle
  doodled
  duel
  dueled
  dull
  dulled
  eleven
  elude
  eluded
  evolve
  evolved
  lede
  lend
  levee
  level
  leveled
  lode
  loll
  lolled
  lone
  loon
  loud
  louden
  loudened
  love
  loved
  lull
  lulled
  lulu
  lune
  needle
  needled
  nodule
  noel
  noodle
  noodled
  nouvelle
  novel
  null
  olden
  oleo
  ovule
  unlevel
  veld
  venule
  vole