| buscadora | seeker |
| Buscaminas | Minehunter |
| Buscando a Nemo | Finding Nemo |
| buscapiés | squib |
| buscar | pick up |
| buscar a tientas | feel |
| buscar agua con la varita de zahorí | divine |
| buscar comida entre la basura | scavenge |
| buscar revolviéndolo todo | rummage about |
| buscar siguiente | find next |
| buscatalentos | talent scout |
| buscavida | go-getter |
| buscona | harlot |
| Buseno | Buseno |
| Bush | Bush |
| Bush y Putin sugieren que existe el potencial para la Tercera Guerra Mundial | Bush and Putin suggest potential for World War III |
| Bushidō | Bushidō |
| bushismo | Bushism |
| Bushmanland | Bushmanland |
| Business Process Management | Business Process Management |
| Business Process Outsourcing | Business process outsourcing |
| Busiris | Busiris |
| Buskerud | Buskerud |
| Busko-Zdrój | Busko-Zdrój |
| Buspirona | Buspirone |
| Bussard ramjet | Bussard ramjet |
| Bussigny-près-Lausanne | Bussigny-près-Lausanne |
| Bussigny-sur-Oron | Bussigny-sur-Oron |
| Busswil bei Büren | Busswil bei Büren |
| Busswil bei Melchnau | Busswil bei Melchnau |
| Bussy-Chardonney | Bussy-Chardonney |
| Bussy-sur-Moudon | Bussy-sur-Moudon |
| Buster Keaton | Buster Keaton |
| busto | bosom |
| Busto Arsizio | Busto Arsizio |
| bustrófedon | boustrophedon |
| Busturialdea - Urdaibai | Busturialdea |
| Busybox | BusyBox |
| Busán | Busan |
| Busō Renkin | Buso Renkin |
| butaca | easy chair |
| Butades | Butades |
| butadieno | butadiene |
| butanesa | Bhutanese |
| butano | butane |
| butanol | butanol |
| butanona | butanone |
| butanés | Bhutanese |
| Butare | Butare |
| Butaritari | Butaritari |
| Butch Cassidy | Butch Cassidy |
| Butch y femme | Butch and femme |
| Butchered at Birth | Butchered at Birth |
| buteno | butene |
| Buteo galapagoensis | Galápagos Hawk |
| Buteo rufinus | Long-legged Buzzard |
| Buteogallus meridionalis | Savanna Hawk |
| Buteogallus urubitinga | Great Black Hawk |
| Buteoninae | Buteoninae |
| Butes | Butes |
| butileno | butylene |
| Butilescopolamina | Butylscopolamine |
| butilo | butyl |
| Butino | Ethylacetylene |
| Butiral de polivinilo | Polyvinyl butyral |
| Butiá | Butia |
| Butomaceae | Flowering rush |
| Buton Rinchen | Buton Rinchen |
| Butorides | Butorides |
| Butorides virescens | Green Heron |
| Butrinto | Buthrotum |
| Butros Butros-Ghali | Boutros Boutros-Ghali |
| Butros Ghali | Boutros Ghali |
| Butte | Conical hill |
| Bután | Bhutan |
