| A | B |
| Cape | a piece of land jutting into the sea or some other large body of water. |
| Fjord | A long, narrow, deep inlet of the sea between high cliffs, as in Norway and Iceland, typically formed by submergence of a glaciated valley |
| Basin | the catchment area of a particular river and its tributaries or of a lake or sea |
| Geyser | a natural spring that sends hot water and steam suddenly into the air from a hole in the ground |
| Tundra | the large flat areas of land in the north of Russia, Canada etc, where it is very cold and there are no trees |
| Butte | a hill with steep sides and a flat top in the western US |
| Plateau | a large area of flat land that is higher than the land around it |
| Mesa | a hill with a flat top and steep sides, in the southwestern US |
| Delta | an area of low land where a river spreads into many smaller rivers near the sea |
| Atoll | a CORAL island in the shape of a ring |
| Archipelago | a group of small islands |
| Lagoon | a lake of sea water that is partly separated from the sea by rocks, sand, or CORAL |
| Isthmus | a narrow piece of land with water on both sides, that connects two larger areas of land |
| Strait | narrow passage of water between two areas of land, usually connecting two seas: |