American vs British

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Across
  1. 4. mad
  2. 7. taxi
  3. 8. maize
  4. 9. film
  5. 11. wardrobe
  6. 12. pavement
  7. 16. railway
  8. 17. rubbish
  9. 20. post
  10. 21. lorry
Down
  1. 1. sweets
  2. 2. football
  3. 3. bill
  4. 5. zip
  5. 6. rubber
  6. 10. engine
  7. 13. jumper
  8. 14. boot
  9. 15. queue
  10. 18. flat
  11. 19. note