Pauls geography puzzle

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Across
  1. 2. underground hollow often having an opening on the side of a hill or cliff
  2. 5. lowland region saturated by water
  3. 7. sandy, pebbly or rocky shore of a body of water
  4. 9. large continues salt body of water
  5. 11. a group of closely scattered islands
  6. 14. Point of land projecting into a body of water
  7. 16. a river or stream that flows into a bigger river or stream
  8. 17. deeper part of a river or harbor
  9. 19. an area of barren land with roughly eroded ridges and peaks
  10. 20. hill that rises abruptly from surrounding area
  11. 21. a stream of water considerable volume
  12. 22. mountains formed when the plates rise up, with lava
  13. 25. density overgrown land with tropical vegetation
Down
  1. 1. flat topped elevated platform
  2. 3. an area of low lying wet land
  3. 4. triangular section of land built up at rivers mouth
  4. 6. an inland grass area
  5. 8. dense growth of trees and plants covering a large area
  6. 10. flat land masses higher than the surrounding land
  7. 12. one of the 7 land masses on earth
  8. 13. large body of ice
  9. 15. an artificial waterway used for irrigation or travel
  10. 18. high, steep or overhanging rock face
  11. 23. a shallow pool at the center of an atoll
  12. 24. a ring shaped reef