A pond is a small body of still water, but there are many different words you can use to describe bodies of water of various sizes and shapes. Some synonyms for pond include lake, pool, reservoir, lagoon, basin, and puddle. While each of these words refers to a body of water, there are subtle differences in their specific meanings. For example, a lake is typically larger and deeper than a pond, while a pool may be smaller and used for swimming. A reservoir is typically a man-made water source, while a lagoon is often associated with the ocean and formed by natural coastal barriers. So, when describing a body of water, it's important to choose the word that best captures its size, shape, and unique characteristics.