Center letter: b
Outer letter: a l n o t u
Answers (51):
  butanol
  abbot
  about
  abut
  baba
  baboon
  ball
  balloon
  ballot
  banal
  banana
  baobab
  baton
  blab
  blat
  blatant
  bloat
  blob
  blot
  blotto
  blunt
  boat
  boba
  bola
  boll
  bolo
  bolt
  bonbon
  bonobo
  boob
  booboo
  boon
  boot
  bout
  bubba
  bulb
  bull
  bunt
  butt
  button
  lobo
  nabob
  nanobot
  noob
  tabla
  taboo
  tuba
  tubal
  unban
  unbolt
  unbutton