Center letter: o
Outer letter: a k l t u w
Answers (30):
  walkout
  allot
  allow
  alto
  atoll
  auto
  koala
  kola
  kook
  kowtow
  loll
  look
  lookout
  loot
  lotto
  lout
  outlaw
  outlook
  outtalk
  tallow
  tattoo
  toll
  took
  tool
  toot
  total
  tout
  wallow
  wool
  woot