Center letter: u
Outer letter: d e l o p t
Answers (62):
  outpolled
  polluted
  delude
  deluded
  depute
  deputed
  dude
  duel
  dueled
  duet
  duetted
  dull
  dulled
  dupe
  duped
  duple
  elude
  eluded
  etude
  letup
  loud
  loupe
  lout
  lull
  lulled
  lulu
  lute
  outdo
  outduel
  outdueled
  outed
  outlet
  outpoll
  output
  pollute
  poult
  pout
  pouted
  puddle
  puddled
  pule
  puled
  pull
  pulled
  pullet
  pullout
  pulp
  pulped
  puppet
  putout
  putt
  putted
  toupee
  tout
  touted
  tulle
  tupelo
  tutee
  tutted
  tutu
  updo
  upped