Center letter: b
Outer letter: a d o r t u
Answers (48):
  outboard
  troubadour
  abbot
  aboard
  abort
  about
  abroad
  abut
  adobo
  arbor
  baba
  baobab
  barb
  bard
  baud
  boar
  board
  boat
  boba
  boob
  booboo
  boor
  boot
  bout
  brad
  brat
  broad
  brood
  brut
  bubba
  burb
  burbot
  burr
  burrata
  burro
  butt
  dartboard
  daub
  doubt
  drab
  drub
  robot
  tabard
  taboo
  tabor
  tuba
  turbo
  turbot