Center letter: n
Outer letter: c e g i l x
Answers (38):
  excelling
  ceiling
  cling
  clinging
  clinic
  egging
  engine
  excellence
  exiling
  gelling
  gene
  genie
  genii
  gigging
  giggling
  gilling
  ginning
  glen
  icing
  incline
  inclining
  innie
  inning
  legging
  lenience
  lien
  line
  linen
  lining
  negligee
  negligence
  nene
  nice
  niece
  niggle
  niggling
  nine
  nixing