* Delta: This is the most common term and refers to a landform created at the mouth of a river where it enters a larger body of water, such as a lake or the sea. Deltas are formed by the deposition of sediment carried by the river.
* Estuary: This is a partially enclosed body of water where freshwater from a river mixes with saltwater from the sea. Estuaries often have a wider mouth than a delta and can be influenced by tides.
* River mouth: This is a general term that simply refers to the point where a river empties into another body of water.
* Floodplain: This is the area of land adjacent to a river that is subject to flooding. The floodplain can extend from the river mouth upstream.
* Marsh: This is a type of wetland that is often found at the mouth of a river, especially in areas with tidal influence.
The specific term that is most appropriate will depend on the specific characteristics of the land at the mouth of the river.
