The crossword solution for the term 'What Can Fall Off A Shelf' is ICEBERG. An ICEBERG is a large mass of ice that has broken off from a glacier or an ice shelf and is floating in open water. It is usually found in the polar regions of the Earth, such as the Arctic and Antarctic. Icebergs can range in size from small chunks to massive structures that are hundreds of feet tall. They can also be dangerous to ships due to their size and the fact that only a small portion of the ICEBERG is visible above the surface of the water.