| Term | Definition |
| archipelago | group of many islands |
| bay | part of an ocean or lake extending into the land and usually smaller than a gulf |
| cape | a point of land extending into a body of water |
| delta | a triangular deposit of sand and soil that collects at the mouth of some rivers |
| gulf | part of an ocean extending into land and usually larger than a bay |
| harbor | a sheltered area of water where ships can anchor safely |
| isthmus | a narrow strip of land with water on both sides, connecting 2 larger areas of land |
| oasis | a fertile place in the desert where there is water and some vegetation |
| strait | a narrow waterway connecting 2 large bodies of water |
| canal | a waterway dug across land through which ships can pass |
| channel | a narrow, deep waterway connecting 2 bodies of water; the deepest part of a river or waterway |
| desert | a dry, barren region that may be sandy and without trees |
| glacier | a huge mass of ice that moves slowly down a mountain |
| island | an area of land completely surrounded by water |
| lake | a large body of water surrounded by land |
| mountain | a land form with high elevation and a pointed or rounded top higher than a hill |
| mountain range | a row of connected mountains |
| mouth (of a river) | the part of a river where its waters flow into another body of water |
| peninsula | land surrounded by water on all sides but one |
| plain | a broad and flat or gently rolling area usually low in elevation |
| river | a large stream of water that flows into a lake, ocean or other body of water |
| swamp | low, wet land that supports grass and trees |
| valley | low land between hills or mountains |
| volcano | an opening in the earth's surface through which steam, ashes, and lava are forced out |