| blasted | condenado |
| blasting | destrucción |
| Blastocystis | Blastocystis hominis |
| blastoderm | blastodermo |
| Blastopore | Blastoporo |
| blasé | hastiado |
| blat | blat |
| blatancy | descaro |
| blatant | puro |
| blather | despotricar |
| Blatten | Blatten |
| Blattodea | Blattodea |
| blazar | blazar |
| blaze | quemar |
| Blaze Bayley | Blaze Bayley |
| blaze up | encenderse |
| blazer | chaqueta de sport |
| Blazhko effect | Efecto Blazhko |
| blazing | ardiente |
| blazon | blasón |
| bleach | decolorar |
| bleacher | gradería |
| bleachers | graderías |
| bleaching | blanqueo |
| bleaching agent | agente blanqueador |
| bleaching clay | arcilla blanqueadora |
| bleaching process | proceso de blanqueo |
| bleak | oscuro |
| Bleak House | Casa desolada |
| Bleaker Island | Isla María |
| bleakness | desolación |
| bleary | nublado |
| bleat | quejarse |
| bleating | balido |
| Blechingia | Blekinge |
| Blechnaceae | Blechnaceae |
| Blechnum | Blechnum |
| Bleck | Pollachius |
| Bleda | Bleda |
| bleed | sangrar |
| Bleed Like Me | Bleed like Me |
| bleed to death | morir desangrado |
| bleeding | hemorragia |
| bleep | pip |
| bleep censor | censor de la señal |
| bleeping | señal aguda e intermitente |
| bleiben | permanecer |
| Bleiburg massacre | Masacre de Bleiburg |
| Bleienbach | Bleienbach |
| Bleiken bei Oberdiessbach | Bleiken bei Oberdiessbach |
| Blekinge | Blekinge |
| Blekinge County | Blekinge |
| blemish | perjudicar |
| blemishes | granos |
| Blemmyes | Blemios |
| blench | vacilar |
| blend | armonizar |
| blended | mezclado |
| blender | licuadora |
| Blender Foundation | Fundación Blender |
| blenders | batidora |
| Blenheim Palace | Palacio de Blenheim |
| Blenio | Distrito de Blenio |
| blepharitis | blefaritis |
| blepharoplasty | blefaroplastia |
| bless | consagrar |
| bless with | dotar de |
| bless you | salud |
| blessed | sagrado |
| Blessed milk thistle | Silybum |
| Blessed Virgin | Virgo |
| Blessed Virgin Mary | Bienaventurada Virgen María |
| blessed with | dotado de |
| Blessedly | Beato |
| blessedness | beatitud |
| blessing | consagración |
| blest | sagrado |
| Bletilla | Bletilla |
| BLEVE | BLEVE |
| Blida | Provincia de Blida |
| Blida Province | Provincia de Blida |
| blight | quemadura |
| Blikanasaurus | Blikanasaurus |
| blimey | caramba |
| blimp | globo |
| blind | deslumbrar |
| blind alley | callejón sin salida |
| Blind belief | Mystique |
| blind date | cita a ciegas |
| Blind experiment | Doble ciego |
| blind faith | credulidad |
| Blind Guardian | Blind Guardian |
| blind gut | ciego |
| Blind Justice | Justicia ciega |
| Blind Lemon Jefferson | Blind Lemon Jefferson |
| blind man | ciego |
