word | | Terrain |
| barren | Qatar | mostly flat and barren desert covered with loose sand and gravel |
| barren | Saint Pierre and Miquelon | mostly barren rock |
| barren | South Georgia and the South Sandwich Islands | ... of the 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 ... |
| barren | United Arab Emirates | flat, barren coastal plain merging into rolling sand dunes of vast desert wasteland; mountains in east |
| barren | West Bank | mostly rugged dissected upland, some vegetation in west, but barren in east |
| barrier | Palau | varying geologically from the high, mountainous main island of Babelthuap to low, coral islands usually fringed by large barrier reefs |
| 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 |