Center letter: b
Outer letter: g i l n o t
Answers (58):
  biltong
  blotting
  bolting
  bottling
  bigot
  bill
  billing
  billion
  binging
  bingo
  binning
  biotin
  biting
  blin
  bling
  blini
  blob
  blobbing
  blog
  blogging
  blot
  blotto
  bobbin
  bobbing
  bobbling
  bogging
  boggling
  boil
  boiling
  boing
  boll
  bolo
  bolt
  bonbon
  bong
  bongo
  boning
  bonito
  bonobo
  boob
  booboo
  booing
  boon
  boot
  booting
  gibbon
  gibing
  glib
  glob
  gobbling
  goblin
  lobbing
  lobo
  nibbling
  noob
  obit
  obliging
  oblong