Another one

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Across
  1. 2. Dense growth of trees
  2. 3. Room for cooking food
  3. 5. Earth's natural satellite
  4. 7. Game with pieces to fit together
  5. 8. Illuminates dark spaces
  6. 10. Organized sound that is pleasing to the ear
  7. 12. Edge of a flowing river
  8. 14. Land surrounded by water
  9. 16. Large vessel that sails the seas
  10. 18. Opening in a wall for light
  11. 19. Transport that runs on tracks
  12. 20. The action of monitoring a specific area
Down
  1. 1. Device used to tell time
  2. 4. Large fortified building
  3. 5. Armed forces of a country
  4. 6. Soft tissue in the mouth that surrounds teeth
  5. 9. A group of animals that live and feed together
  6. 11. A wax stick used for light
  7. 13. Large, cigar-shaped aircraft filled with gas
  8. 15. Having or exerting supreme influence or controlā 
  9. 17. Animal often used for riding