Center letter: t
Outer letter: a b c d i r
Answers (42):
  catbird
  addict
  arctic
  atria
  attar
  attic
  attract
  baccarat
  bait
  bariatric
  brat
  cacti
  carat
  cart
  cataract
  ciabatta
  citric
  critic
  dart
  data
  diacritic
  dicta
  didact
  didactic
  dirt
  drat
  rabbit
  raita
  ratatat
  ribbit
  tabard
  tacit
  tact
  tactic
  tart
  tartar
  tiara
  tibia
  tidbit
  tract
  trait
  triad