Center letter: n
Outer letter: b c e i l v
Answers (25):
  invincible
  vincible
  beeline
  been
  blin
  blini
  clinic
  eleven
  enliven
  even
  evince
  incline
  innie
  lenience
  lien
  line
  linen
  liven
  nene
  nibble
  nice
  niece
  nine
  vein
  vine