1. The act of providing notice or caution.

2. A narrow and long extension of the sea that has steep cliffs as it's borders.

3. The main area where activity occurs.

4. A large overflow or flow of water that often occurs on land.

5. A massive sea wave brought on by an undersea volcanic eruption or seaquake.

6. Intense vibrations that occur in the earth's crust.

7. The highest point on a summit, mountain etc.

8. An intense wavelike movement.

9. A long, narrow area that moves water from one place to another.

10. A rock formation with a fracture in it.

11. A catastrophic event, often resulting in loss of life and property.