word | | Terrain |
| flat | Austria | in the west and south mostly mountains (Alps); along the eastern and northern margins mostly flat or gently sloping |
| flat | Azerbaijan | large, flat Kur-Araz Ovaligi (Kura-Araks 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 ... |
| flat | Bahamas, The | long, flat coral formations with some low rounded hills |
| flat | Bangladesh | mostly flat alluvial plain; hilly in southeast |
| flat | Barbados | relatively flat; rises gently to central highland region |
| flat | Belarus | generally flat and contains much marshland |
| flat | Belgium | flat coastal plains in northwest, central rolling hills, rugged mountains of Ardennes Forest in southeast |
| flat | Belize | flat, swampy coastal plain; low mountains in south |
| flat | Benin | mostly flat to undulating plain; some hills and low mountains |
| flat | Botswana | predominantly flat to gently rolling tableland; Kalahari Desert in southwest |
| flat | Brazil | mostly flat to rolling lowlands in north; some plains, hills, mountains, and narrow coastal belt |
| flat | British Indian Ocean Territory | flat and low (most areas do not exceed two meters in elevation) |
| flat | British Virgin Islands | coral islands relatively flat; volcanic islands steep, hilly |
| flat | Brunei | flat coastal plain rises to mountains in east; hilly lowland in west |
| flat | Burkina Faso | mostly flat to dissected, undulating plains; hills in west and southeast |