Answer:
1. TSUNAMI - large wave caused by an underwater earthquake or volcano.
2. SINKHOLE - depression in the land generally caused when rain dissolves limestone.
3. ARCHIPELAGO - a group of islands
4. PROVINCE - a political division
5. CAVERN - underground area usually created when limestone is dissolved .
6. PENINSULA - land area surrounded by water on three sides.
7. MAINLANDS - the principal land mass of a continent or country.
8. MARITIME - on or near an ocean or sea
NOTE- Words are in capital letters. Their meaning are matched with them.