| Term | Definition |
| Altitude | How high up something is |
| Canyon | Deep, narrow valley, steep sides, stream |
| Cape | Land projecting into a body of water |
| Fjord | Narrow inlet or arm of land bordered by sea |
| Gulf | A body of water slightly bigger than a bay |
| Island | An area of land completely surrounded by water |
| Isthmus | A narrow strip of land completely surrounded by water |
| Lake | An accumulation of water |
| Ocean | Atlantic, Pacific, Indian, Antarctic, Arctic |
| Peninsula | Land almost completely surrounded by water, connected by isthmus |
| River | A natural stream of water, larger than a creek |
| Sea | A continuous body of salt water |
| Strait | A narrow stretch of water connecting two large bodies of water |
| Tributary | A stream flowing into a larger one |
| Valley | A stretch of low land, lying between mountains or hills |