Solve these clues to fill the grid.
- A natural body of running water flowing on or under the earth
- 3 Across
- The particular auditory effect produced by a given cause
- 4 Across
- Large area covered with trees
- 5 Across
- Huge body of salt water
- 6 Across
- A large mass of land projecting into a body of water
- 9 Across
- A treeless grassy plain
- 12 Across
- A relatively flat highland
- 13 Across
- Extensive tract of level open land
- 14 Across
- Long stream of water flowing to the sea
- 15 Across
- A sheltered port where ships can take on or discharge cargo
- 1 Down
- A strip of land projecting into a body of water
- 2 Down
- A narrow channel of the sea joining two larger bodies of water
- 4 Down
- A deep and relatively narrow body of water that allows the best passage for vessels
- 7 Down
- A large or extra supply of something
- 8 Down
- A long depression in the surface of the land that usually contains a river
- 10 Down
- A body of water cut off from a larger body by a reef of sand or coral
- 11 Down