Center letter: i
Outer letter: a b d h r t
Answers (28):
  birdbath
  aria
  arid
  atria
  bait
  bird
  birria
  birth
  braid
  briar
  dirt
  drib
  habit
  habitat
  hair
  rabbi
  rabbit
  rabid
  radii
  raid
  raita
  ribbit
  third
  tiara
  tibia
  tidbit
  trait
  triad