word | | Location |
| bordering | Yemen | Middle East, bordering the Arabian Sea, Gulf of Aden, and Red Sea, between Oman and Saudi Arabia |
| Borneo | Malaysia | Southeastern Asia, peninsula bordering Thailand and northern one-third of the island of Borneo, bordering Indonesia, Brunei, and the South China Sea, south of Vietnam |
| Bornholm | Denmark | Northern Europe, bordering the Baltic Sea and the North Sea, on a peninsula north of Germany (Jutland); also includes several major islands (Sjaelland, Fyn, and Bornholm) |
| Bosnia | Croatia | Southeastern Europe, bordering the Adriatic Sea, between Bosnia and Herzegovina and Slovenia |
| Bosporus | Turkey | southeastern Europe and southwestern Asia (that portion of Turkey west of the Bosporus is geographically part of Europe), bordering the Black Sea, between Bulgaria and Georgia, and bordering the Aegean Sea and ... |
| Bothnia | Finland | Northern Europe, bordering the Baltic Sea, Gulf of Bothnia, and Gulf of Finland, between Sweden and Russia |
| Bothnia | Sweden | Northern Europe, bordering the Baltic Sea, Gulf of Bothnia, Kattegat, and Skagerrak, between Finland and Norway |
| Brac | Cayman Islands | Caribbean, three-island group (Grand Cayman, Cayman Brac, Little Cayman) in Caribbean Sea, 240 km south of Cuba and 268 km northwest of Jamaica |
| Brazil | Bolivia | Central South America, southwest of Brazil |
| Brazil | France | ... Sea, between Italy and Spain French Guiana: Northern South America, bordering the North Atlantic Ocean, between Brazil and Suriname Guadeloupe: Caribbean, islands between the Caribbean Sea and the North Atlantic Ocean, southeast ... |
| Brazil | Paraguay | Central South America, northeast of Argentina, southwest of Brazil |
| Brazil | Uruguay | Southern South America, bordering the South Atlantic Ocean, between Argentina and Brazil |
| Britain | Ireland | Western Europe, occupying five-sixths of the island of Ireland in the North Atlantic Ocean, west of Great Britain |