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Across
  1. 4. - Largest ocean
  2. 5. - Flower symbolizing eternal love
  3. 8. - "Sea cow"
  4. 11. - Gas composition
  5. 13. - Famous lake
  6. 14. - Famous desert
  7. 15. - Shuttlecock
  8. 17. - Art medium
  9. 19. - Australian animal
Down
  1. 1. - Cooking method
  2. 2. - God of dreams
  3. 3. - September birthstone
  4. 6. - Climate phenomenon
  5. 7. - Korean garment
  6. 8. - U.S. river
  7. 9. - Mathematics
  8. 10. - Tokyo district
  9. 12. - Buddhist temple
  10. 16. - Christmas beverage
  11. 18. - Atmospheric layer