| A | B |
|---|
| subregion | smaller area of a region |
| isthmus | narrow stretch of land connecting two larger land areas |
| archipelago | group of islands |
| escarpment | steep cliff at the edge of a plateau with a lowland area below |
| Llanos | tropical grasslands that stretch through eastern Colombia and Venezuela |
| Pampas | treeless grassland of Argentina and Uruguay |
| tributary | small river that flows into a larger river |
| estuary | an area where river currents and ocean tide meet |
| gasohol | human-made fuel produced from mixing gasoline and alcohol made from sugercane |
