Synonyms river (a large natural flow of fresh water): We going to get across the river by boat.
stream (a small narrow river): A lovely stream flows through our garden during the summer.
creek (a stream or minor tributary of a river): We’ll go to the little creek soon.
brook (a small stream): We rested a while by a babbling brook.
waterway (a body of water, that is navigable): The river Vistula is one of the most important waterway.
tributary (a stream that flows into a larger body of water): This river has three major tributaries, and many minor ones.