| B.S. | licenciado en ciencias |
| B.Sc. | licenciado en ciencias |
| BA | licenciado en letras |
| BA CityFlyer | BA Cityflyer |
| Ba Sing Se | Ba Sing Se |
| BA-CA TennisTrophy | Torneo de Viena |
| baa | balar |
| Baa Atoll | Atolón Baa |
| Baa Baa Black Sheep | Baa Baa Black Sheep |
| Baade Wesselink method | Método de Baade-Wesselink |
| baaing | balido |
| Baal | Baal |
| Baal Shem Tov | Israel ben Eliezer |
| Baalbek | Baalbek |
| Baarle | Baarle |
| Baarle-Hertog | Baarle-Hertog |
| Baasha | Baasa |
| Baath Party | Partido Baaz Árabe Socialista |
| Bab-el-Mandeb | Bab-el-Mandeb |
| Baba ghanoush | Baba ghanoush |
| Baba Sawan Singh | Baba Sawan Singh |
| Baba Yaga | Baba Yaga |
| Babaco | Carica pentagona |
| Babalu Aye | Babalú Ayé |
| Babar the Elephant | Babar |
| Babarian | Bárbaro |
| babble | balbucear |
| babbler | charlatán |
| babbling | facundo |
| babe | bebé |
| Babe Ruth | Babe Ruth |
| Babe Zaharias | Babe Zaharias |
| Babel | Babel |
| Babeldaob | Babeldaob |
| Babesiosis | Babesiosis |
| Babeş-Bolyai University | Universidad Babeş-Bolyai |
| Babi Yar | Babi Yar |
| Babidi | Babidi |
| Babil Governorate | Babil |
| baboon | mandril |
| Babri Mosque | Babri Masjid |
| Babrius | Babrio |
| Babsk | Babsk |
| Babur | Babur |
| baby | bebé |
| baby bottle | biberón |
| baby buggy | cochecito de niño |
| baby carriage | cochecito de niño |
| Baby colic | Cólico del lactante |
| Baby Doll | Baby Doll |
| baby formula | fórmula |
| baby shower | baby shower |
| baby sitter | niñero |
| Baby sling | Bandolera-bebé |
| baby snatcher | secuestrador |
| baby talk | balbuceo infantil |
| baby tooth | diente de leche |
| Baby transport | Carrito de bebé |
| baby-faced | con cara de niño |
| baby-sit | hacer de niñero |
| baby-sitter | niñero |
| baby-sitting | hacer de niñero |
| babyhood | infancia |
| babyish | infantil |
| Babylon | Babilonia |
| Babylonia | Babilonia |
| Babylonian | Babilonio |
| Babylonian captivity | Cautiverio de Babilonia |
| Babylonian Chronicles | Crónicas Mesopotámicas |
| Babylonian numerals | Numeración babilónica |
| babysitter | niñera |
| Bac Giang Province | Khanh Hoa |
| BAC Strikemaster | BAC Strikemaster |
| Bac Trung Bo | Costa Central del Norte |
| Bacardi | Bacardí |
| Bacary Sagna | Bacary Sagna |
| baccalaureate | bachillerato |
| baccara | bacará |
| baccarat | bacará |
| bacchanal | bacanal |
| bacchanalian | bacanal |
| Baccharis | Baccharis |
| bacchic | báquico |
| Bacchus | Baco |
| Bacchus and Ariadne | El festín de los dioses |
| Bacchylides | Baquílides |
| Baccio da Montelupo | Baccio da Montelupo |
| Bach | Bach |
| Bach family | Familia Bach |
| Bach flower remedies | Flores de Bach |
| BACH motif | Motivo BACH |
| bachata | bachata |
| bachelor | soltero |
| Bachelor of Arts | licenciado en letras |
| Bachelor of Science | licenciado en ciencias |
| bachelor party | despedida de soltero |
| bachelor's button | margarita |
| bachelor's degree | bachillerato |
| bachelorette | soltera |
| bachelorette party | despedida de soltera |
| bachelorhood | celibato |
| Bachianas brasileiras | Bachianas brasileiras |
| Bachir Gemayel | Bashir Gemayel |
| bacilli | bacterias |
| bacillus | bacilo |
| Bacillus anthracis | Bacillus anthracis |
| Bacillus Calmette-Guérin | Bacillus Calmette-Guerin |
| back | defensa |
| back away | alejarse |
| back cover | contraportada |
| back door | puerta trasera |
| back down | echarse atrás |
| Back draught | Acojinamiento |
| back fire | contrafuego |
| Back for the First Time | Back For The First Time |
| Back in Black | Back In Black |
| back of beyond | quinto pino |
| back of the head | nuca |
| back off | echarse atrás |
| back out | echarse atrás |
| back pedaling | marcha atrás |
| back pedalling | marcha atrás |
| Back rank checkmate | Mate del pasillo |
| back road | camino vecinal |
| back seat | asiento trasero |
| Back streets | Barrios bajos |
| back support | respaldo |
| back talk | impertinencia |
| Back to Basics | Back to Basics |
| Back to Basics Tour | Back To Basics World Tour |
| Back to Bedlam | Back to Bedlam |
| Back to Black | Back to Black |
| back to front | al revés |
| Back To Jerusalem movement | Retorno a Jerusalén |
| Back to the Egg | Back to the Egg |
| Back to the Future | Regreso al futuro |
| Back to the Future Part II | Back to the future II |
| Back to the Future Part III | Back To The Future III |
| Back to the Future trilogy | Regreso al futuro |
| back up | embotellamiento |
| back vowel | vocal posterior |
| back window | ventanilla trasera |
| back yard | traspatio |
