Center letter: o
Outer letter: y a c h l n
Answers (57):
  halcyon
  achoo
  ahoy
  alcohol
  alloy
  aloha
  ancho
  annoy
  anon
  anyhoo
  cacao
  callaloo
  cannon
  canola
  canon
  canyon
  cloaca
  cloy
  coach
  coal
  coca
  cocoa
  cocoon
  coho
  cola
  colcannon
  colon
  colony
  conch
  cool
  coolly
  coyly
  halo
  holly
  holy
  honcho
  hooch
  llano
  loach
  loan
  local
  locally
  loch
  loco
  loll
  loon
  loony
  loyal
  loyally
  nacho
  nonlocal
  noon
  nylon
  onlay
  only
  yahoo
  yoohoo