Center letter: b
Outer letter: a d i l u y
Answers (31):
  audibly
  ably
  alibi
  baba
  baby
  badly
  bail
  bald
  baldly
  ball
  ballad
  baud
  bialy
  biddy
  bilabial
  bill
  billy
  blab
  blabby
  bubba
  bubbly
  buddy
  build
  bulb
  bull
  bully
  daub
  labia
  labial
  laudably
  lullaby