Center letter: o
Outer letter: a c h i l t
Answers (63):
  catholic
  achoo
  aioli
  alcohol
  alcoholic
  allot
  aloha
  alto
  atoll
  cacao
  calico
  callaloo
  chaotic
  chocoholic
  ciao
  cloaca
  clot
  cloth
  coach
  coal
  coat
  coati
  coattail
  coca
  cocci
  cocoa
  coho
  coil
  coital
  cola
  colic
  colt
  cool
  coot
  halo
  holt
  hooch
  hoot
  iota
  litho
  loach
  loath
  local
  loch
  loci
  loco
  loll
  loot
  lotto
  oath
  octal
  oilcloth
  olio
  taco
  tailcoat
  tattoo
  toccata
  toil
  toll
  tool
  toot
  tooth
  total