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"
S: (n) backwater (a body of water that was created by a flood or tide or by being held or forced back by a dam) "the bayous and backwaters are breeding grounds for mosquitos"
S: (n) bay, embayment (an indentation of a shoreline larger than a cove but smaller than a gulf)
S: (n) channel (a deep and relatively narrow body of water (as in a river or a harbor or a strait linking two larger bodies) that allows the best passage for vessels) "the ship went aground in the channel"
S: (n) drink (any large deep body of water) "he jumped into the drink and had to be rescued"
S: (n) estuary (the wide part of a river where it nears the sea; fresh and salt water mix)
S: (n) flowage (a body of water that has been created by deliberately flooding an area) "many campsites were located near the flowage"
S: (n) mid-water (the water that is well below the surface but also well above the bottom) "many marine fishes inhabit the mid-waters"
S: (n) ocean (a large body of water constituting a principal part of the hydrosphere)
S: (n) offing (the part of the sea that can be seen from the shore and is beyond the anchoring area) "there was a ship in the offing"
S: (n) polynya (a stretch of open water surrounded by ice (especially in Arctic seas))
S: (n) pool, puddle (a small body of standing water (rainwater) or other liquid) "there were puddles of muddy water in the road after the rain"; "the body lay in a pool of blood"
S: (n) sea (a division of an ocean or a large body of salt water partially enclosed by land)
S: (n) seven seas (an informal expression for all of the oceans of the world) "the old salt had sailed the seven seas"