word | | Terrain |
| abruptly | Angola | narrow coastal plain rises abruptly to vast interior plateau |
| abruptly | Christmas Island | steep cliffs along coast rise abruptly to central plateau |
| Abseron | Azerbaijan | ... Lowland) (much of it below sea level) with Great Caucasus Mountains to the north, Qarabag Yaylasi (Karabakh Upland) in west; Baku lies on Abseron Yasaqligi (Apsheron Peninsula) that juts into Caspian Sea |
| active | French Southern and Antarctic Lands | ... island is the top of a volcano, rocky with steep cliffs on the eastern side; has active thermal springs Iles Crozet: a large archipelago formed from the Crozet Plateau is divided into ... |
| active | Heard Island and McDonald Islands | Heard Island - 80% ice-covered, bleak and mountainous, dominated by a large massif (Big Ben) and an active volcano (Mawson Peak); McDonald Islands - small and rocky |
| active | South Georgia and the South Sandwich Islands | ... rising steeply from the sea, are rugged and mountainous; South Georgia is largely barren and has steep, glacier-covered mountains; the South Sandwich Islands are of volcanic origin with some active volcanoes |
| activity | Saint Helena | the islands of this group result from volcanic activity associated with the Atlantic Mid-Ocean Ridge Saint Helena: rugged, volcanic; small scattered plateaus and plains Ascension: surface covered by lava flows and ... |
| adjacent | Slovenia | a short coastal strip on the Adriatic, an alpine mountain region adjacent to Italy and Austria, mixed mountains and valleys with numerous rivers to the east |
| Adriatic | Croatia | geographically diverse; flat plains along Hungarian border, low mountains and highlands near Adriatic coastline and islands |
| Adriatic | Slovenia | a short coastal strip on the Adriatic, an alpine mountain region adjacent to Italy and Austria, mixed mountains and valleys with numerous rivers to the east |
| air | Indian Ocean | ... currents in the northern Indian Ocean; low atmospheric pressure over southwest Asia from hot, rising, summer air results in the southwest monsoon and southwest-to-northeast winds and currents, while high pressure ... |
| Alaska | United States | vast central plain, mountains in west, hills and low mountains in east; rugged mountains and broad river valleys in Alaska; rugged, volcanic topography in Hawaii |
| Alay | Tajikistan | Pamir and Alay Mountains dominate landscape; western Fergana Valley in north, Kofarnihon and Vakhsh Valleys in southwest |
| alluvial | Bangladesh | mostly flat alluvial plain; hilly in southeast |
| Alpha | Arctic Ocean | ... landmasses; the ocean floor is about 50% continental shelf (highest percentage of any ocean) with the remainder a central basin interrupted by three submarine ridges (Alpha Cordillera, Nansen Cordillera, and Lomonosov Ridge |
| alpine | Slovenia | a short coastal strip on the Adriatic, an alpine mountain region adjacent to Italy and Austria, mixed mountains and valleys with numerous rivers to the east |
| Alps | Austria | in the west and south mostly mountains (Alps); along the eastern and northern margins mostly flat or gently sloping |
| Alps | France | ... plains or gently rolling hills in north and west; remainder is mountainous, especially Pyrenees in south, Alps in east French Guiana: low-lying coastal plains rising to hills and small mountains Guadeloupe ... |
| Alps | Germany | lowlands in north, uplands in center, Bavarian Alps in south |
| Alps | Liechtenstein | mostly mountainous (Alps) with Rhine Valley in western third |
| Alps | Romania | central Transylvanian Basin is separated from the Plain of Moldavia on the east by the Carpathian Mountains and separated from the Walachian Plain on the south by the Transylvanian Alps |
| Alps | Switzerland | mostly mountains (Alps in south, Jura in northwest) with a central plateau of rolling hills, plains, and large lakes |
| Altai | Kazakhstan | extends from the Volga to the Altai Mountains and from the plains in western Siberia to oases and desert in Central Asia |
| Altiplano | Bolivia | rugged Andes Mountains with a highland plateau (Altiplano), hills, lowland plains of the Amazon Basin |