Center letter: l
Outer letter: a d g n r u
Answers (43):
  glandular
  alga
  algal
  anal
  angular
  annal
  annual
  annul
  annular
  arugula
  aural
  dual
  dull
  dullard
  gala
  galangal
  gall
  gangland
  garland
  glad
  gland
  glug
  gnarl
  gradual
  granular
  gulag
  gull
  laggard
  land
  lard
  laud
  luau
  lull
  lulu
  luna
  lunar
  lung
  lunula
  null
  raglan
  rural
  ulna
  ulnar