| A | B | 
|---|
| lake | a body of water surrounded by land | 
| gulf | part of an ocean that extends into the land; larger than a bay | 
| harbor | a sheltered place along a coast where boats dock safely | 
| strait | a narrow waterway that connects two larger bodies of water | 
| ocean | a large body of salt water;  covers much of the Earth's surface | 
| sea | a body of salt water smaller than an ocean | 
| river | a stream of water that flows across the land and empties into another body of water | 
| island | a body of land completely surrounded by water | 
| isthmus | a narrow strip of land that connects two larger bodies of land | 
| penisula | a body of land nearly surround by water | 
| delta | land made of silt left behind as a river drains into a larger body of water | 
| plain | a large area of nearly flat land | 
| plateau | an area of elevated flat land | 
| mountain | a high landform with steep sides; higher than a hill | 
| valley | an area of low land between hills or mountains | 
| source | the starting point of a river | 
| rugged coastline | jagged and/or uneven land along an ocean | 
| rainforest | a place with rain almost all year round, whee trees and plants grow close together | 
| desert | a dry environment with few plants and animals |