| buhardilla | attic |
| Buhen | Buhen |
| buho | owl |
| buhonera | pedlar |
| buhonero | pedlar |
| Build | Build engine |
| Builder | Film editor |
| Built to spill | Built to Spill |
| Buin | Buin |
| buitre | vulture |
| buitre leonado | griffon vulture |
| buitre negro | Eurasian black vulture |
| buitrón | fish-trap |
| Bujara | Bukhara |
| bujeta | tin |
| bujia | candle |
| Bujinkan | Bujinkan |
| Bujis | Bakha |
| bujía | candle |
| Buka | Buka Island |
| bukake | bukkake |
| Bukavu | Bukavu |
| bukkake | bukkake |
| Bulacán | Bulacan |
| Bulawayo | Bulawayo |
| bulbo | bulb |
| Bulbo galáctico | Galactic bulge |
| bulbo sólido | corm |
| Bulbophyllum | Bulbophyllum |
| bulboso | bulbous |
| bulder | bouldering |
| buldog | bulldog |
| Bulerías | Bulerias |
| bulevar | boulevard |
| Bulgan | Bulgan Province |
| Bulgaria | Bulgaria |
| Bulgaria Air | Bulgaria Air |
| Bulgaria del Volga | Volga Bulgaria |
| Bulgaria durante la Segunda Guerra Mundial | Military history of Bulgaria during World War II |
| Bulgaria en el Festival de la Canción de Eurovisión | Bulgaria in the Eurovision Song Contest |
| bulimia | bulimia |
| bulimia nerviosa | bulimia |
| Bulk | Bulk purchasing |
| Bull | Groupe Bull |
| bulla | row |
| bullabesa | bouillabaisse |
| bulldog | bulldog |
| Bulldog Americano | American Bulldog |
| bulldog francés | French Bulldog |
| bulldozer | bulldozer |
| bullectomía | bullectomy |
| bullente | ebullient |
| Bullet For My Valentine | Bullet for My Valentine |
| Bullet in a Bible | Bullet in a Bible |
| Bullet time | Bullet time |
| Bullet With Butterfly Wings | Bullet with Butterfly Wings |
| bulletin board system | bulletin board system |
| Bullfrog Productions | Bullfrog Productions |
| bullicio | trouble |
| bullicioso | turbulent |
| bullir | teem |
| Bullitt | Bullitt |
| bullmastiff | Bullmastiff |
| Bullpup | Bullpup |
| Bullsquid | Bullsquid |
| bullying | bullying |
| Bulma | Bulma |
| Bulnesia sarmientoi | Bulnesia sarmientoi |
| bulo | canard |
| bulto | growth |
