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Across
  1. 4. - Underground opening
  2. 5. - Flowing water
  3. 6. - Area filled with trees
  4. 9. - Land surrounded by water
  5. 11. - Large body of water
  6. 12. - Largest body of water
Down
  1. 1. - Dry place with little rain
  2. 2. - Low land between hills
  3. 3. - Falling water
  4. 7. - Small raised land
  5. 8. - Very high land
  6. 10. - Sandy place by water