1. Tsar
  2. Tzar
  3. Czar
  4. Zara
  5. Saar
  6. Sorry!
    by Hasbro
  7. SARS
  8. TARS
    The robot from Interstellar
  9. Sarsgaard
  10. Gyllenhaal
  11. Car
    Suggested by @Aliiice