Center letter: r
Outer letter: a b c i k t
Answers (48):
  brickbat
  arabica
  arctic
  aria
  atria
  attar
  attract
  baccarat
  backtrack
  barb
  barback
  barbaric
  bariatric
  bark
  barrack
  bicarb
  birria
  brat
  briar
  brick
  carat
  carb
  cart
  cataract
  circa
  cirri
  citric
  crab
  crack
  crib
  crick
  critic
  karat
  kart
  rabbi
  rabbit
  rack
  raita
  ratatat
  ribbit
  rick
  tart
  tartar
  tiara
  track
  tract
  trait
  trick