| Term | Definition |
|---|
| Cliff | A steep, high face of rock. |
| Prarie | A wide area of level or rolling, wet, tall grassland. |
| Channel | The deepest part of a river harbor |
| Canal | An artificial waterway used for irrigation or travel |
| Butte | A tall, isolated rocky hill or mountain with a flat top and steep sides. |
| Canyon | A deep valley with high, steep walls. |
| Peninsula | A landform surrounded by water on three sides |
| Forest | A large area thickly covered with trees |
| Jungle | Land covered by dense tropical vegetation. |
| Geyser | A natural hot spring that intermittently ejects steam and hot water into the air. |
| Iceberg | A mass of floating ice that has broken away from a glacier. |
| Continent | A large, principal land mass. |
| Mountain | A rugged mass of rock that rises above the surrounding landscape with steep slopes and a peak or summit |
| Gulf | An area of a sea or ocean partially enclosed by land; larger than a bay. |
| Valley | An elongated lowland between mountain ranges or hills; often has a river or stream running along the bottom. |
| Savanna | An open grassland with widely spaced trees in a hot, seasonally dry climate. |
| Marsh | A wetlands area always or sometimes covered with shallow water whose main types of plants are soft-stemmed reeds, sedges, and grasses |
| Plain | A large area of relatively flat or gently rolling land. |
| Strait | A relatively narrow waterway joining two larger bodies of water. |
| Archipelago | An arc-shaped chain of islands. |
| Swamp | A lowland region saturated by water. |
| Bay | A body of water partially enclosed by land with a wide outlet to the ocean. |
| Glacier | A large body of ice that moves across the earth's surface. |
| Dunes | A ridge or hill of sand blown or drifted by the wind in deserts or on beaches. |
| Delta | A triangular plain formed by the gravel, silt, sand, and clay deposited at a river's mouth where it slows to meet another body of water. |
| Cape | A pointed piece of land jetting into the sea from the coastline of a continent or large island. |
| Desert | A dry, barren region that receives little or no precipitation. |
| Sound | A long, relatively wide body of water, larger than a channel or strait, that often connects larger bodies of water. |
| Fjord | A long, narrow coastal valley between tall, rocky cliffs, gouged out by a glacier and flooded by the sea. |
| Tundra | Vast treeless plains with permafrost and small, low plants. |
| Waterfall | A natural stream of water descending from a steep height. |
| Beach | A sandy, pebbly, or rocky shore of a body of water. |
| Coral Reef | A mound or ridge of coral polyps and their hard limestone remains, combined with sand and minerals. |
| Crater | A bowl-shaped depression in the earth or the funnel-shaped opening of a volcano. |
| Ocean | The earth's largest continuous stretches of saltwater. |
| Island | A piece of land, smaller than a continent, completely surrounded by water. |
| Badlands | A barren area with eroded ridges, peaks and mesas, and sparse vegetation. |
| Lagoon | A shallow pool of water at the center of an atoll. |
| Hill | A natural land elevation smaller than a mountain. |
| Isthmus | A narrow strip of land between two seas or oceans that connects two larger land areas. |
| River | `A stream of water of considerable volume. |
| Panhandle | A narrow projection of a larger territory, as in Florida, Texas, and Oklahoma. |
| Atoll | A ring-shaped island formed by coral buildup on the rim of an underwater volcano. |
| Mesa | Flattop, elevated landform. |
| Lake | A large inland body of fresh or saltwater. |
| Cave | An underground hollow with an opening at the surface. |
| Rainforest | A dense tropical evergreen forest with an annual rainfall of at least 100 inches. |
| Sea | A body of saltwater surrounded almost entirely by land. |
| Volcano | An opening in the earth's crust through which red-hot, melted rock, or magma rises to the surface from deep inside the earth and spills out as lava. |
| Plateau | A very large, flat area of land that usually is higher than the land around it, with at least one steep slope. |
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