Center letter: t
Outer letter: d e g h l n
Answers (33):
  lengthened
  delete
  deleted
  delt
  dent
  dented
  detente
  entente
  gelt
  gent
  genteel
  gentle
  gentled
  length
  lengthen
  lent
  netted
  nettle
  nettled
  teed
  teen
  teeth
  teethe
  teethed
  tell
  tend
  tended
  tenet
  tent
  tented
  tenth
  thee
  then