Center letter: g
Outer letter: a d n o r u
Answers (47):
  aground
  agar
  agog
  agora
  angora
  argon
  augur
  dang
  doggo
  dong
  drag
  dragon
  dragoon
  drug
  dugong
  dung
  durag
  gaga
  gang
  goad
  gonad
  gong
  gonna
  good
  goon
  gorgon
  gourd
  grad
  gran
  grand
  grandad
  granddad
  groan
  grog
  ground
  guano
  guar
  guard
  guru
  nonagon
  orang
  organ
  raga
  ragu
  rang
  rung
  unground