Center letter: o
Outer letter: a g h l t u
Answers (42):
  although
  agog
  allot
  aloha
  alto
  atoll
  auto
  galoot
  ghoul
  gloat
  glottal
  goal
  goat
  googol
  goth
  gotta
  gout
  halo
  holt
  hoot
  loath
  logo
  loll
  loot
  lotto
  lout
  oath
  ought
  outgo
  outthought
  tattoo
  thou
  though
  thought
  toga
  toll
  tool
  toot
  tooth
  total
  tough
  tout