word | | Terrain |
| base | Cayman Islands | low-lying limestone base surrounded by coral reefs |
| base | Tonga | most islands have limestone base formed from uplifted coral formation; others have limestone overlying volcanic base |
| basin | 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 |
| basin | Atlantic Ocean | ... in the northern Atlantic, counterclockwise warm-water gyre in the southern Atlantic; the ocean floor is dominated by the Mid-Atlantic Ridge, a rugged north-south centerline for the entire Atlantic basin |
| Basin | Bolivia | rugged Andes Mountains with a highland plateau (Altiplano), hills, lowland plains of the Amazon Basin |
| basin | Congo, Democratic Republic of the | vast central basin is a low-lying plateau; mountains in east |
| basin | Congo, Republic of the | coastal plain, southern basin, central plateau, northern basin |
| Basin | Georgia | ... the south; Kolkhet'is Dablobi (Kolkhida Lowland) opens to the Black Sea in the west; Mtkvari River Basin in the east; good soils in river valley flood plains, foothills of Kolkhida Lowland |
| basin | Iran | rugged, mountainous rim; high, central basin with deserts, mountains; small, discontinuous plains along both coasts |
| basin | Kosovo | flat fluvial basin with an elevation of 400-700 m above sea level surrounded by several high mountain ranges with elevations of 2,000 to 2,500 m |
| Basin | Peru | western coastal plain (costa), high and rugged Andes in center (sierra), eastern lowland jungle of Amazon Basin (selva) |
| Basin | 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 |
| basins | Kyrgyzstan | peaks of Tien Shan and associated valleys and basins encompass entire nation |
| basins | Macedonia | mountainous territory covered with deep basins and valleys; three large lakes, each divided by a frontier line; country bisected by the Vardar River |
| basins | Serbia | extremely varied; to the north, rich fertile plains; to the east, limestone ranges and basins; to the southeast, ancient mountains and hills |
| Bassas | French Southern and Antarctic Lands | ... of high mountains, hills, valleys, and plains with a number of peninsulas stretching off its coasts Bassas da India (Iles Eparses): atoll, awash at high tide; shallow (15 m) lagoon Europa Island ... |
| Basse | France | ... Alps in east French Guiana: low-lying coastal plains rising to hills and small mountains Guadeloupe: Basse-Terre is volcanic in origin with interior mountains; Grande-Terre is low limestone formation; most ... |
| Bavarian | Germany | lowlands in north, uplands in center, Bavarian Alps in south |
| bays | Iceland | mostly plateau interspersed with mountain peaks, icefields; coast deeply indented by bays and fiords |
| beach | Nauru | sandy beach rises to fertile ring around raised coral reefs with phosphate plateau in center |
| beaches | Maldives | flat, with white sandy beaches |
| beaches | Puerto Rico | mostly mountains with coastal plain belt in north; mountains precipitous to sea on west coast; sandy beaches along most coastal areas |
| beaches | Saint Barthelemy | hilly, almost completely surrounded by shallow-water reefs, with 20 beaches |
| Beaufort | Arctic Ocean | ... meters thick, although pressure ridges may be three times that thickness; clockwise drift pattern in the Beaufort Gyral Stream, but nearly straight-line movement from the New Siberian Islands (Russia) to Denmark ... |
| Bekaa | Lebanon | narrow coastal plain; El Beqaa (Bekaa Valley) separates Lebanon and Anti-Lebanon Mountains |