| Term | Definition |
|---|
| archipelago | a group of closely located islands |
| atoll | ring-shaped island formed by coral buildup on the rim of an underwater volcano |
| canyon | deep, narrow valley with high steep walls |
| delta | triangular section of land built up at a river's mouth |
| glacier | large body of ice that moves across the earth's surface |
| jungle | densely overgrown land with tropical vegetation |
| ocean | large continuous body of salt water |
| sea | body of salt water surrounded almost entirely by land |
| sound | long, wide body of water connecting larger bodies of water, larger than a channel |
| badlands | area of barren land with roughly eroded ridges and peaks |
| cape | point of land projecting into a body of water |
| desert | dry areas of land, desolate, waterless, and without vegetation |
| gulf | an area of sea or ocean partially enclosed by land, larger than a bay |
| lagoon | shallow pool of water at the center of an atoll |
| peninsula | piece of land that is surrounded by land on three sides |
| swamp | lowland region saturated by water |
| bay | body of water partially enclosed by land with a wide outlet to the ocean |
| cave | underground hollow often having an opening in the side of a hill or cliff |
| dune | in deserts and on beaches, windblown sands that have formed hills |
| hill | part of land that rises noticeably above the rest of the land |
| lake | body of water completely surrounded by land |
| plain | flat or gently rolling lands |
| beach | sandy, pebbly or rocky shore of a body of water |
| tundra | vast treeless plains with permafrost and small, low plants |
| channel | deeper part of a river or harbor |
| fjord | long, steep-sided glacial valley now filled by seawater |
| iceberg | long chunks of ice that breaks off of glaciers |
| marsh | an area of low-lying wet land |
| plateau | flat land mass higher than the surrounding land, with at least one steep side |
| valley | lowland between mountain ranges or hills, often having a river or stream running along the bottom |
| butte | hill that rises abruptly from surrounding area with sloping sides and a flat top |
| cliff | high, steep or overhanging rock face |
| forest | dense growth of trees and other plants covering a large area |
| island | a piece of land surrounded by water |
| mesa | flat-topped, elevated landform |
| prairie | an inland grassland area |
| volcano | mountains formed when lava rises through the earth's crust |
| canal | an artificial waterway used for irrigation or travel |
| continent | one of the seven large land masses on earth |
| geyser | natural hot spring that emits a column of water and steam into the air |
| isthmus | narrow piece of land that connects two large landmasses and separates two bodies of water |
| mountain | land that rises above surrounding land with steep slopes and a peak or summit |
| river | a stream of water of considerable volume |
| waterfall | steep descent of water from a height |
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