Center letter: g
Outer letter: a d e m n u
Answers (50):
  agendum
  undamaged
  unmanaged
  adage
  aged
  agenda
  ague
  damage
  damaged
  dang
  dengue
  dung
  edge
  edged
  egad
  egged
  endgame
  engage
  engaged
  gadded
  gaga
  gage
  gagged
  game
  gamed
  gamma
  gang
  ganged
  gauge
  gauged
  gemmed
  gene
  gummed
  gunman
  gunmen
  gunned
  mage
  magma
  magnum
  manage
  managed
  manga
  mange
  mega
  mugged
  mung
  nagged
  nudge
  nudged
  unengaged