| 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 |
| Aaron Klug | Aaron Klug |
| Aaron Lennon | Aaron Lennon |
| Aaron Sorkin | Aaron Sorkin |
| Aaron Spelling | Aaron Spelling |
| Aaronic | aarónico |
| AARP | AARP |
| Aaru | Aaru |
| Aarwangen | Aarwangen |
| Aarón Sáenz Garza | Aarón Sáenz |
| Aarón Ñíguez | Aarón Ñíguez |
| Aase syndrome | Síndrome de Aase |
| Aash Al Maleek | Aash Al Maleek |
| Aasiaat | Aasiaat |
| Aasáx language | Aasax |
| ab initio | ab initio |
| Ab urbe condita | Ab urbe condita |
| AB variable star | Estrella variable AB |
| Ababda | Ababda |
| abaca | abacá |
| Abacaenum | Abakainón |
| abacist | abacista |
| aback | atrás |
| Abaco | Ábaco |
| Abaco Islands | Islas Ábaco |
| abacus | ábaco |
| Abacá | Musa textilis |
| Abadan | Abadán |
| Abaddon | Abaddon |
| Abadiño | Abadiano |
| abaft | a popa |
| Abaiang | Abaiang |
| Abakan | Abakán |
| Abakan International Airport | Abakán |
| Abakan River | Río Abakán |
| abalone | loco |
| Abaltzisketa | Abalcisqueta |
| Abancay | Abancay |
| Abancay Province | Provincia de Abancay |
| abandon | suspender |
