word | | Geography - note |
| Andes | Ecuador | Cotopaxi in Andes is highest active volcano in world |
| Anegada | Virgin Islands | important location along the Anegada Passage - a key shipping lane for the Panama Canal; Saint Thomas has one of the best natural deepwater harbors in the Caribbean |
| Angel | Venezuela | on major sea and air routes linking North and South America; Angel Falls in the Guiana Highlands is the world's highest waterfall |
| Antarctic | Southern Ocean | the major chokepoint is the Drake Passage between South America and Antarctica; the Polar Front (Antarctic Convergence) is the best natural definition of the northern extent of the Southern Ocean; it is ... |
| Antarctica | Southern Ocean | the major chokepoint is the Drake Passage between South America and Antarctica; the Polar Front (Antarctic Convergence) is the best natural definition of the northern extent of the Southern Ocean; it is ... |
| Antarctica | World | ... common classification recognizes seven, which are (from largest to smallest): Asia, Africa, North America, South America, Antarctica, Europe, and Australia. Asia and Europe are sometimes lumped together into a Eurasian continent resulting ... |
| Antigua | Antigua and Barbuda | Antigua has a deeply indented shoreline with many natural harbors and beaches; Barbuda has a large western harbor |
| Antilles | Anguilla | the most northerly of the Leeward Islands in the Lesser Antilles |
| Antilles | Cuba | largest country in Caribbean and westernmost island of the Greater Antilles |
| Antilles | Dominica | ... fauna, which are protected by an extensive natural park system; the most mountainous of the Lesser Antilles, its volcanic peaks are cones of lava craters and include Boiling Lake, the second-largest ... |
| apart | Cote d'Ivoire | most of the inhabitants live along the sandy coastal region; apart from the capital area, the forested interior is sparsely populated |
| Apennines | San Marino | landlocked; smallest independent state in Europe after the Holy See and Monaco; dominated by the Apennines |