body of water,
water the part of the earth's surface covered with water (such as a river or lake or ocean); "they invaded our territorial waters"; "they were sitting by the water's edge"
river a large natural stream of water (larger than a creek); "the river was navigable for 50 miles"
cascade a succession of stages or operations or processes or units; "progressing in severity as though a cascade of genetic damage was occurring"; "separation of isotopes by a cascade of processes"
cataract a large waterfall; violent rush of water over a precipice