1. bay - a small body of water that is partly surrounded by land. 2. gulf - a large body of water that is partly surrounded by land. 3. peninsula - land that is surrounded by water on 3 sides and land on 1 side. 4. plains - a large flat area of land; prairie. 5. glacier - a slow moving, long lasting river of ice that moves on land. 6. canyon - a deep valley with very steep sides usually carved by a river.