Center letter: o
Outer letter: d g i n x z
Answers (31):
  oxidizing
  dingo
  dino
  dioxin
  dodging
  dodo
  dogging
  doggo
  doing
  dong
  donning
  doxing
  doxx
  doxxing
  dozing
  going
  gong
  gonging
  gonzo
  good
  goon
  indigo
  iodizing
  ionizing
  nodding
  noggin
  noon
  ongoing
  onion
  oozing
  zoning