Center letter: i
Outer letter: l o p d e g
Answers (62):
  dogpile
  dogpiled
  deli
  diddle
  diddled
  died
  dildo
  dill
  diode
  diploid
  dipole
  dipped
  doggie
  dogie
  dollied
  eddied
  elide
  elided
  epilog
  gelid
  geoid
  gigged
  giggle
  giggled
  gigolo
  gild
  gilded
  gill
  gilled
  glide
  glided
  goodie
  idle
  idled
  idol
  igloo
  iodide
  lidded
  lied
  liege
  lipid
  lipo
  lipped
  lollipop
  oiled
  oldie
  olio
  ollie
  opioid
  piddle
  piddled
  pied
  pigged
  pile
  piled
  pill
  pilled
  pipe
  piped
  plie
  plied
  polio