Center letter: r
Outer letter: a c i m t u
Answers (39):
  traumatic
  arctic
  aria
  arum
  atria
  atrium
  attar
  attract
  aura
  carat
  cart
  cataract
  circa
  circuit
  cirri
  citric
  cram
  critic
  curium
  curt
  maraca
  marm
  mart
  murmur
  raita
  ratatat
  tamari
  tarmac
  tart
  tartar
  tiara
  tract
  trait
  tram
  tramcar
  trauma
  trim
  tritium
  uric