Center letter: a
Outer letter: d g i l n z
Answers (62):
  dazzling
  adding
  addling
  again
  aging
  aiding
  ailing
  alga
  algal
  align
  aligning
  anal
  angina
  angling
  annal
  dandling
  dang
  dangling
  dazing
  dial
  dialing
  gadding
  gaga
  gagging
  gain
  gaining
  gala
  galangal
  gall
  galling
  gang
  ganging
  gangland
  ganglia
  gangling
  gazing
  glad
  gland
  glazing
  glia
  inlaid
  inland
  lading
  ladling
  lagging
  laid
  lain
  lanai
  land
  landing
  lazing
  naan
  nada
  nagging
  naiad
  nail
  nailing
  nana
  zagging
  zigzag
  zigzagging
  zinnia