Center letter: l
Outer letter: d g i n u v
Answers (34):
  divulging
  diddling
  dill
  dull
  dulling
  giggling
  gild
  gilding
  gill
  gilling
  gliding
  glug
  glugging
  gluing
  guild
  gull
  gulling
  idling
  indulging
  linguini
  lining
  livid
  living
  lugging
  luging
  lull
  lulling
  lulu
  lung
  lunging
  niggling
  null
  unliving
  vigil