General terms:
* Pond: A small body of water, often artificial, that is usually shallower than a lake and surrounded by land.
* Pool: A small body of water, often stagnant, formed in a depression in the ground.
* Stream: A small body of flowing water, smaller than a river.
* Creek: A small stream, often flowing through a narrow valley.
* Bayou: A slow-moving stream or body of water, often in a swampy area.
* Lagune: A shallow body of water separated from a larger body of water by a narrow strip of land.
* Gully: A small channel carved by running water.
Specific terms:
* Puddle: A small, shallow pool of water, often formed after rain.
* Spring: A place where groundwater flows naturally to the surface.
* Sprout: A small, fresh stream of water.
* Waterhole: A depression in the ground that fills with water, often used by animals for drinking.
The best word to use will depend on the specific context and the characteristics of the body of water in question.