Center letter: r
Outer letter: b g i n o z
Answers (38):
  bronzing
  boor
  boring
  born
  boron
  borzoi
  bribing
  brig
  bring
  bringing
  brining
  brio
  gorging
  gorgon
  goring
  grin
  grinning
  grog
  groin
  ignoring
  inborn
  iron
  ironing
  nigiri
  noir
  nori
  origin
  orzo
  ribbing
  ribbon
  ribboning
  rigging
  rigor
  ring
  ringing
  robbing
  robin
  robing