Running water is a term used to describe the flow of liquid, usually water, in a particular direction. The term can be broken down into three crossword solutions: STREAM (6 letters), Rillet (6 letters), and River (5 letters). A STREAM is a small body of flowing water, such as a creek or brook. A rillet is a small STREAM or brook, usually one that is intermittent or ephemeral. Finally, a river is a large natural STREAM of water that flows through a channel in the surface of the ground.