Center letter: u
Outer letter: c e h l n o
Answers (22):
  luncheon
  cellule
  clue
  couch
  coulee
  cull
  eunuch
  hull
  hunch
  louche
  lull
  lulu
  lunch
  lune
  noun
  nucleon
  null
  ouch
  ounce
  uncle
  unclench
  uncool