Water pocket is a term used to describe a naturally occurring depression or hollow in the earth's surface that contains water. There are several synonyms for water pocket, including oasis, pond, lagoon, creek, pool, reservoir, and well. An oasis is a desert water pocket characterized by lush vegetation, while a pond is a small body of standing water. Lagoon refers to a shallow body of water separated from a larger body by a barrier, such as a reef or sandbank. A creek is a small stream of water, while a pool is a deeper body of water. A reservoir is a man-made water pocket, and a well refers to a hole drilled into the ground to access water.