| A | B |
| archipelago | a large chain or group of islands |
| valley | an area of low land between hills and mountains |
| basin | an area of low lying land surrounded by higher land |
| tributary | a river or stream that flows into a larger body of water |
| canal | a waterway built to carr water irrigation or navigation |
| strait | a narrow waterway or channel connecting two larger bodies of water |
| canyon | a deep, narrow valley with steep sides |
| source | the place where a river or stream begins |
| cape | a projecting part of a coastline that extends into an ocean, sea, gulf, bay or lake |
| river basin | all the land drained by a river and its tributaries |
| dam | a wall built across a river to hold back the flowing water |
| river | a large stream of water that flows across the land and usually empties into a lake, ocean or river. |
| delta | land formed at the mout of the river by deposits of silt, sand, and pebbles |
| reservoir | a natural or artificial lake used to store water |
| desert | a very dry area where few plants grow |
| plateau | a high, flat landform that rises steeply above the surrounding land |
| fjord | a deep, narrow inlet of the sea, bordered by steep cliffs |
| plain | a large area of flat or nearly flat land |
| gulf | part of an ocean or sea that extends into the land |
| peninsula | a body of land nearly surrounded by water |
| hill | a rounded, raised landform, not as high as a mountain |
| mountain | a high, rounded or pointed landform with steep sides |
| isthmus | a narrow strip of land borderd by water that connects two larger areas of land |
| mouth | the place where a river empties into another body of water |
| lake | a body of water completely surrounded by land |