The term 'Huge Wave' can be summarized by two crossword solutions: TSUNAMI (7 letters) and SEA (3 letters). A TSUNAMI is a large, powerful wave caused by an underwater earthquake or volcanic eruption. It is usually generated in the ocean, but can also occur in other bodies of water. The SEA is a large body of salt water that covers most of the Earth's surface. Tsunamis are often associated with the SEA, as they are created by seismic activity beneath the ocean floor.