Center letter: e
Outer letter: c i l n o x
Answers (41):
  lexicon
  cell
  celli
  cello
  clone
  colleen
  collie
  colonel
  cone
  excel
  excellence
  exec
  exile
  icicle
  incline
  innie
  innocence
  lenience
  leonine
  lice
  lien
  line
  linen
  lone
  loonie
  nene
  neocon
  neon
  nice
  niece
  nine
  noel
  nonce
  none
  oleic
  oleo
  ollie
  once
  online
  oxen
  xenon