Center letter: n
Outer letter: d g i l y z
Answers (25):
  dizzyingly
  diddling
  digging
  ding
  dinging
  dingy
  dining
  dizzying
  dying
  gigging
  giggling
  gilding
  gilling
  ginning
  gliding
  idling
  inning
  lining
  lying
  niggling
  ninny
  zigging
  zing
  zinging
  zingy