Center letter: c
Outer letter: e f l n o u
Answers (30):
  confluence
  flounce
  cell
  cello
  cellule
  clef
  clone
  clue
  cocoon
  coffee
  colleen
  colon
  colonel
  cone
  cool
  coulee
  cuff
  cull
  effluence
  fence
  fleece
  loco
  neocon
  nonce
  nucleon
  once
  ounce
  uncle
  uncool
  uncuff