Center letter: t
Outer letter: a b h i l u
Answers (37):
  habitual
  halibut
  abut
  alit
  atilt
  baht
  bait
  bath
  bathtub
  blat
  built
  butt
  habit
  habitat
  halt
  hath
  hatha
  hiatal
  hilt
  lath
  lilt
  tabla
  tail
  tali
  tall
  tallit
  taut
  that
  tibia
  tibial
  till
  tilt
  tilth
  tuba
  tubal
  tutti
  tutu