Center letter: b
Outer letter: a c k l o t
Answers (47):
  backlot
  bootblack
  aback
  abbot
  baba
  babka
  back
  backtalk
  balk
  ball
  ballcock
  ballot
  baobab
  blab
  black
  blackball
  blat
  bloat
  blob
  bloc
  block
  blot
  blotto
  boat
  boba
  bobcat
  bock
  bola
  boll
  bolo
  bolt
  boob
  booboo
  book
  boot
  cabal
  cabala
  callback
  cobalt
  collab
  cookbook
  kabob
  lobo
  lookbook
  tabla
  taboo
  tobacco