Low land is a term used to describe areas of land that are lower than the surrounding area. VALLEY (6 letters) is a long, narrow depression in the Earth's surface, typically between hills or mountains. Swale (5 letters) is a low-lying tract of land, especially one that is moist or marshy. FEN (3 letters) is an area of low-lying, marshy ground, often fed by water from a nearby river or lake. VALE (4 letters) is a VALLEY, especially a broad VALLEY between hills or mountains. DALE (4 letters) is a VALLEY, especially in northern England. LEA (3 letters) is a grassy meadow or pasture, especially in southern and midland England.