Center letter: h
Outer letter: a d e l m p
Answers (30):
  headlamp
  ahead
  ahem
  aleph
  alpha
  deadhead
  deadheaded
  halal
  hale
  hall
  hammed
  head
  headed
  heal
  healed
  heap
  heaped
  heed
  heeded
  heel
  heeled
  held
  hell
  helm
  helmed
  help
  helped
  heme
  hemmed
  hemp