The 25 words

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Across
  1. 3. sandy pebbly or rocky shore of a body of water
  2. 6. Steep descent of water from a height
  3. 7. part of land that rises noticeably above the rest of the land
  4. 10. Deeper part of a river or harbor
  5. 11. Flat landmass higher than the surrounding land with at least one steep side
  6. 14. Narrow piece of land that connects two large landmasses and separates two bodies of water
  7. 16. A narrow waterway or channel connecting two larger bodies of water
  8. 17. in deserts and on beaches are windblown sands that have formed hills
  9. 18. Dense growth of trees and other plants covering a large area
  10. 19. Natural hot spring that emits a column of water and steam into the air
Down
  1. 1. An artificial waterway used for irrigation or travel
  2. 2. Flat-topped and elevated landforms
  3. 4. One of the seven large landmasses on Earth
  4. 5. mountains formed when lava rises through the earth's crust
  5. 8. A piece of land surrounded by water
  6. 9. Body of water completely surrounded by land
  7. 11. An inland grassland area
  8. 12. Vast treeless plains with permafrost and small and low plants
  9. 13. Long but steep-sided and glacial valley now filled by seawater
  10. 14. Large chunks of ice that break off of glaciers
  11. 15. High and steep or overhanging rock face