pond
nounA body of stagnant water without an outlet, larger than a puddle, and smaller than a lake; or a like body of water with a small outlet. In the United States, we give this name to collections of water in the interior country, which are fed by springs, and from which issues a small stream. These ponds are often a mile or two or even more in length, and the current issuing from them is used to drive the wheels of mills and furnaces.