| A | B |
|---|
| a large chain of islands | archipelago |
| a ring-shaped coral island surrounding a lagoon | atoll |
| an area of low-lying land surrounded by higher land | basin |
| a small, flat-topped hill | butte |
| a projecting part of a coastline | cape |
| land formed at the mouth of a river by silt | delta |
| a deep, narrow inlet of the sea between cliffs | fjord |
| a hilly area at the base of a mountain range | foothills |
| a large sheet of ice that moves across land | glacier |
| a narrow stretch connecting two larger bodies of land | isthmus |
| a high, flat landform rising steeply above surrounding land | mesa |
| place where a river empties into the sea | mouth |
| a high, flat landform larger than a butte or a mesa | plateau |
| a lake used to store water | reservoir |
| all the land area drained by a river | river basin |
| a narrow waterway or channel | strait |
| a line above which trees do not grow | timber line |
| a stream that flows into a larger one | tributary |
| a body of land nearly surrounded by water | peninsula |
| a ridge of coral, etc., near the surface of the sea | reef |
| where a river or stream begins | source |
| large area of nearly flat land | plain |
| green, watered spot in the desert | oasis |
| a place where ships can safely anchor | harbor |
| a pond partly cut off from the sea | lagoon |
