Center letter: e
Outer letter: i l n p u v
Answers (48):
  vulpine
  eleven
  enliven
  ennui
  epee
  even
  evil
  innie
  levee
  level
  lien
  lieu
  line
  linen
  lineup
  live
  liven
  lune
  lupine
  nene
  nine
  ninepin
  nipple
  peel
  peen
  peep
  peeve
  penile
  penne
  pile
  pileup
  pine
  pipe
  pipeline
  plie
  pule
  uneven
  unlevel
  unpen
  unpile
  unveil
  veep
  veil
  vein
  venue
  venule
  vile
  vine