swampswamp /swɑmp/ noun 
► swamp
► swamp land that is usually partly covered with shallow water, and often has trees growing in it. Swamps are usually in hot places: The swamp is full of alligators.
► marsh an area of soft very wet ground, often with grasses growing in it: This plant is found in marshes and shallow water.
► bog an area of soft wet muddy ground: My foot sank in the bog and when I tried to pull it out I lost my shoe.
► wetlands land that is partly covered with water, and has grasses and other plants growing in it. Wetlands are often important places for birds or animals to live in: We must protect these wetlands and not let them be turned into farmland.