| A Walk to Remember | A Walk to Remember |
| a watched pot never boils | el ojo del amo engorda al caballo |
| a wealth of | una gran cantidad de |
| A week ago | Hace una semana |
| A Weekend in the City | A Weekend in the City |
| a weight off someone's mind | un peso de encima |
| a weight on someone's mind | un peso encima |
| a while | un poco |
| a whole lot of | una gran cantidad de |
| A Whole Lot of Nothing | A whole lot of nothing |
| A Wild Sheep Chase | La caza del carnero salvaje |
| A Wizard of Earthsea | Un mago de Terramar |
| A Woman Holding a Balance | La tasadora de perlas |
| A Woman of Paris | A Woman of Paris |
| A Woman Under the Influence | Una mujer bajo la influencia |
| a world of difference | un mundo de diferencia |
| a zillion | número astronómico |
| A* search algorithm | Algoritmo de búsqueda A* |
| A*Teens | A*Teens |
| A-bomb | bomba atómica |
| A-ha | A-ha |
| A-law | Derecho |
| A-law algorithm | Ley A |
| A-League | A-League |
| A-OK | Acojonante |
| A-wing | Ala-A |
| a.m. | a.m. |
| a.s.a.p. | lo más pronto posible |
| AA | Asociación automovilística |
| AA battery | Mignon |
| Aa River | AA |
| AAA | Asociación automovilística |
| AAA attendant | mecánico del servicio de carreteras |
| AAA road service | Real Automóvil Club de España |
| Aabenraa | Abenrá |
| Aabenraa Municipality | Abenrá |
| Aachen | Aquisgrán |
| Aachen Cathedral | Catedral de Aquisgrán |
| AACS encryption key controversy | Controversia por la clave de cifrado AACS |
| Aage Niels Bohr | Aage Niels Bohr |
| aah | ¡ay! |
| AAL | AAL |
| Aalborg | Aalborg |
| Aalborg Boldspilklub | Aalborg Boldspilklub |
| Aalen | Aalen |
| Aalenian | aaleniano |
| Aalesunds FK | Aalesunds FK |
| aalii | chirca |
| Aaliyah | Aaliyah |
| Aalst | Aalst |
| aAmplitude | amplitud |
| Aar | Aar |
| Aarau | Aarau |
| Aarberg | Aarberg |
| Aarburg | Aarburg |
| Aardman Animations | Aardman Animations |
| aardvark | cerdo hormiguero |
| aardwolf | lobo de tierra |
| Aargau | Cantón de Argovia |
| Aarhus | Århus |
| Aarhus County | Århus |
| Aarhus Gymnastik Forening | AGF Århus |
| Aarhus Municipality | Århus |
| Aari language | Idioma arí |
| Aarne-Thompson classification system | Aarne-Thompson |
| Aaron | Aarón |
| Aaron Abeyta | El Hefe |
| Aaron ben Moses ben Asher | Aarón-Ben-Asser |
| Aaron Burr | Aaron Burr |
| Aaron Carter | Aaron Carter |
| Aaron Ciechanover | Aarón Ciechanover |
| Aaron Copland | Aaron Copland |
