Center letter: n
Outer letter: b d e l m o
Answers (59):
  embolden
  emboldened
  been
  bellmen
  bend
  blend
  blended
  blond
  blonde
  bonbon
  bond
  bonded
  bone
  boned
  bonobo
  boon
  debone
  deboned
  demon
  done
  donee
  donned
  ebon
  emend
  emended
  ended
  ennoble
  ennobled
  lemon
  lend
  lone
  loon
  melodeon
  melon
  mend
  mended
  mondo
  mono
  moon
  mooned
  need
  needed
  needle
  needled
  nene
  neon
  noble
  noblemen
  nodded
  node
  noel
  none
  noob
  noodle
  noodled
  noon
  odeon
  olden
  omen