| bosom friend | intime |
| boson | boson |
| Bosonic string theory | Théorie des cordes bosoniques |
| Bosonid dynasty | Bosonides |
| Bosons | Boson |
| Bosphorus | Bosphore |
| Bosphorus Bridge | Pont du Bosphore |
| Bosporus | Bosphore |
| Bosra | Bosra |
| boss | chef |
| boss around | bousculer |
| Bossey Ecumenical Institute | Institut œcuménique de Bossey |
| Bossonnens | Bossonnens |
| bossy | autoritaire |
| Bostancı | Bostancı |
| Boston | Boston |
| Boston Bruins | Bruins de Boston |
| Boston Celtics | Celtics de Boston |
| Boston Legal | Boston Justice |
| Boston Marathon | Marathon de Boston |
| Boston Massacre | Massacre de Boston |
| Boston Molasses Disaster | Désastre de mélasse de Boston |
| Boston Red Sox | Red Sox de Boston |
| Boston Strangler | Albert Henry DeSalvo |
| Boston Symphony Orchestra | Orchestre symphonique de Boston |
| Boston Tea Party | Boston Tea Party |
| Boston terrier | Terrier de Boston |
| Boston University | Université de Boston |
| Bostrichidae | Bostrichidae |
| Bostrichiformia | Bostrichiformia |
| Bosut | Bosut |
| BosWash | BosWash |
| Boswil | Boswil |
| Bot | Bot |
| Botafogo | Botafogo Futebol Clube |
| Botafogo de Futebol e Regatas | Botafogo de Futebol e Regatas |
| botanic | botanique |
| botanical | botanique |
| botanical conservatory | jardin botanique |
| botanical garden | jardin botanique |
| Botanical Garden in Berlin | Jardin botanique de Berlin |
| Botanical Garden of the University of Coimbra | Jardin botanique de Coimbra |
| Botanical gardens | Jardin botanique |
| Botanichesky Sad | Jardin botanique |
| botanist | botaniste |
| botanize | herboriser |
| botany | botanique |
| Botany Bay | Botany Bay |
| Botargo | Poutargue |
| Botaurus | Botaurus |
| botch | ruiner |
| botch up | gâter |
| Botellón | Botellon |
| Botevgrad | Botevgrad |
| Botevo | Botevo |
| botfly | œstre |
| both | l'un et l'autre |
| Both Sides | Both sides |
| bother | souci |
| bother about | s'occuper de |
| bothersome | importun |
