Center letter: o
Outer letter: u c e h l n
Answers (41):
  luncheon
  cello
  cloche
  clone
  cocoon
  coho
  colleen
  colon
  colonel
  conch
  cone
  cool
  couch
  coulee
  echelon
  echo
  hellhole
  hello
  hole
  honcho
  hone
  hooch
  loch
  loco
  loll
  lone
  loon
  louche
  neocon
  neon
  noel
  nonce
  none
  noon
  noun
  nucleon
  oleo
  once
  ouch
  ounce
  uncool