Center letter: n
Outer letter: b e i l t u
Answers (59):
  bulletin
  ebullient
  beeline
  been
  beltline
  bent
  bitten
  blin
  blini
  blunt
  bunt
  ennui
  entente
  entitle
  inbuilt
  inlet
  innie
  intel
  intent
  intuit
  inutile
  lenient
  lent
  lentil
  lien
  line
  linen
  linnet
  lint
  lintel
  lune
  lunette
  nene
  nettle
  nibble
  nine
  nineteen
  nite
  nubbin
  nubble
  nubile
  null
  teen
  tenet
  tent
  tine
  tint
  tune
  tunnel
  unbelt
  unbent
  unbuilt
  unit
  unite
  unlet
  unlit
  untie
  until
  untune