Answer:
1. To overturn - capsize
2 A marine mammal- dolphin
3. A piece of land almost surrounded by sea - peninsula
4 Able to inflict a poisonous bite or sting- venomous
5 The line along which the earth and sky apparently meet - horizon
6 A violent, tropical storm - hurricane
7 A light, narrow boat propelled by paddles - canoe
Hope this helps!