Center letter: h
Outer letter: a d o p r t
Answers (33):
  arthropod
  hardtop
  arhat
  doth
  hard
  hardhat
  harp
  hart
  hath
  hatha
  hoar
  hoard
  hood
  hoodoo
  hoop
  hoorah
  hoot
  hora
  horror
  hotpot
  hotrod
  oath
  paratha
  path
  pharaoh
  phat
  photo
  pooh
  that
  throat
  tooth
  torah
  troth