S: (n) mare clausum ((closed sea) a navigable body of water under the jurisdiction of a single nation)
S: (n) mare liberum ((free sea) a navigable body of water to which all nations have equal access)
S: (n) rapid (a part of a river where the current is very fast)
S: (n) Cross-Florida Waterway, Okeechobee Waterway (a waterway used by small boats to travel between the Atlantic Ocean and the Gulf of Mexico through Lake Okeechobee and the Caloosahatchee Canal and the Caloosahatchee River)
S: (n) 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"