Center letter: b
Outer letter: i k l n o t
Answers (34):
  inkblot
  bikini
  bilk
  bill
  billion
  biotin
  blin
  blini
  blink
  blob
  blot
  blotto
  bobbin
  bobolink
  boil
  boink
  boll
  bolo
  bolt
  bonbon
  bonito
  bonk
  bonobo
  boob
  booboo
  book
  boon
  boot
  kilobit
  knob
  lobo
  lookbook
  noob
  obit