| Term | Definition |
| Peninsula | A body of land nearly surrounded by water |
| Plain | A large area of flat or nearly flat land |
| Plateau | A broad, flat area of land higher than the surrounding land |
| Prairie | a large area of grassland |
| Reef | A ridge of sand, rock, or coral that lies at or near the surface of a sea |
| River Mouth | The place where a river empties into another body of water |
| Sea level | The level of the sea's surface used to measure the elevation of other locations |
| Strait | A narrow waterway or channel connecting two larger bodies of water |
| Tributary | A river or stream that flows into a larger river or stream |
| Valley | An area of low land between hills or mountains |
| Peak | The highest point or summit of a mountain |
| Oasis | An area of vegetation in the middle of a desert, usually surrounding a spring or water source. |
| Mountain | A high land form that stretches above the surrounding area and comes to a point. |
| Mesa | An elevated area of land with a flat top and steep sides that are usually cliffs (plants can grow here and it is smaller than a plateau. |
| Isthmus | A narrow strip of land connecting two larger bodies of land. |