Center letter: r
Outer letter: a d k l o w
Answers (35):
  workload
  ardor
  arrow
  award
  awkward
  dark
  dollar
  dolor
  door
  dorado
  dork
  draw
  drawl
  droll
  drool
  lard
  lark
  lord
  odor
  okra
  oral
  radar
  road
  roadwork
  roar
  roll
  rood
  rook
  wallaroo
  ward
  warlord
  woodwork
  word
  work
  world