Center letter: a
Outer letter: b d h k n o
Answers (29):
  handbook
  abandon
  adobo
  ankh
  anon
  baba
  babka
  baboon
  banana
  band
  bandana
  bandanna
  bank
  baobab
  boba
  dank
  doodad
  haboob
  haka
  hand
  hank
  hookah
  kabob
  khan
  koan
  naan
  nabob
  nada
  nana