Study hall of justice

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Across
  1. 3. alien spices
  2. 4. alien
  3. 10. butler
  4. 12. wonder women
  5. 15. English teacher
  6. 16. hometown
  7. 18. principle
  8. 20. school
  9. 21. poison ivy
Down
  1. 1. batman
  2. 2. joker
  3. 5. god spices
  4. 6. secret country
  5. 7. home
  6. 8. since kid
  7. 9. bully
  8. 11. robot
  9. 13. principals daughter
  10. 14. cat women
  11. 17. PE
  12. 19. basement