| Butomaceae | Butomaceae |
| Butrint National Park | Parc national de Butrint |
| Butrus al-Bustani | Boutros al-Boustani |
| butt | bout |
| butt in | ramener sa fraise |
| butt plug | plug |
| butt-naked | cul nu |
| Butte County | Comté de Butte |
| Butte du Lion | Butte du Lion |
| Butte-aux-Cailles | Butte aux Cailles |
| butter | beurrer |
| butter dish | beurrier |
| butter knife | couteau à beurre |
| butter roll | gâteau au beurre |
| Butter tea | Thé au beurre |
| butter up | baratiner |
| buttercup | renoncule |
| butterfingered | empoté |
| butterfingers | empoté |
| Butterflies Are Free | Butterflies Are Free |
| butterfly | papillon |
| Butterfly bush | Buddleia de David |
| Butterfly Cluster | Amas du Papillon |
| Butterfly diagram | Diagramme papillon |
| Butterfly effect | Effet papillon |
| butterfly knife | balisong |
| butterfly net | filet à papillons |
| Butterfly orchid | Platanthera |
| Butterfly ray | Gymnuridae |
| butterfly stroke | brasse papillon |
| Butterfly sword | Couteau papillon |
| Butterfly theorem | Théorème du papillon |
| buttermilk | babeurre |
| butternut squash | doubeurre |
| butterscotch | caramel au beurre |
| butterwort | grassette |
| Butterworth filter | Filtre de Butterworth |
| Buttisholz | Buttisholz |
| buttock | fesse |
| buttocks | postérieur |
| button | badge |
| button mushroom | champignon de Paris |
| button-cell battery | pile bouton |
| buttonhole | boutonnière |
| buttress | appui |
| Buttwil | Buttwil |
| Butylated hydroxyanisole | Hydroxyanisole butylé |
| Butylated hydroxytoluene | Hydroxytoluène butylé |
| butylene | butylène |
| Butylscopolamine | Butylscopolamine |
| Butyraldehyde | Butanal |
| butyric acid | acide butyrique |
| Buus | Buus |
| Buxa Tiger Reserve | Parc national de Buxa |
| Buxaceae | Buxaceae |
| Buxales | Buxales |
| buxom | bien en chair |
| Buxtehude | Buxtehude |
| buy | achat |
| buy back | racheter |
| buy in | s'approvisionner en |
| Buy Nothing Day | Journée sans achat |
| buy off | corrompre |
| buy on credit | acheter à crédit |
| buy out | désintéresser |
| buy something outright | acheter quelque chose comptant |
| buy the farm | casser sa pipe |
| buy through an installment plan | acheter à crédit |
| buy up | acheter en bloc |
| buyable | achetable |
| buyback | rétrocession |
| Buyei | Buyei |
| Buyeo | Puyo |
| Buyeo County | Comté de Buyeo |
| buyer | acheteur |
| Buyid dynasty | Bouyides |
| buying | achat |
| buying spree | frénésie d'achats |
| buyout | rachat |
| Buys Ballot Medal | Médaille Buys Ballot |
| Buzau | Buzău |
| Buzen Province | Province de Buzen |
| Buzkashi | Bouzkachi |
| Buzuluk | Bouzoulouk |
| buzz | coup de téléphone |
| Buzz Aldrin | Buzz Aldrin |
| buzz off | partir |
| buzzard | buse |
| Buzzcocks | Buzzcocks |
| buzzer | ronfleur |
| buzzing | bourdonnement |
| buzzword | mot à la mode |
| Buzzword bingo | Business loto |
| Buzău | Buzău |
