| atheism | ateísmo |
| atheist | ateo |
| Atheist Alliance International | Premio Richard Dawkins |
| atheistic | ateo |
| Athelas | Athelas |
| Athelstan of England | Athelstan |
| Athena | Atenea |
| Athena and Phevos | Athenà y Phèvos |
| Athenagoras | Patriarca Atenágoras I |
| Athenagoras of Athens | Patriarca Atenágoras I |
| Athene | Atenas |
| Athene noctua | Athene noctua |
| Athenian | ateniense |
| Athenian democracy | Democracia griega |
| Athenodoros Cananites | Atenodoro Cananita |
| Athens | Atenas |
| Athens Charter | Carta de Atenas |
| Athens International Airport | Aeropuerto Internacional Eleftherios Venizelos |
| Athens Metro | Metro de Atenas |
| Athens News Agency | Athens News Agency |
| Athens Olympic Sports Complex | Complejo Olímpico de Deportes de Atenas |
| Athens Prefecture | Atenas |
| Athens Stock Exchange | Bolsa de valores de Atenas |
| Athens University of Economics and Business | Universidad de Economía y Negocio de Atenas |
| Atheriniformes | Atheriniformes |
| Atherton Antechinus | Antechinus godmani |
| Athina Roussel | Athina Roussel |
| athirst | sediento |
| Athis-Mons | Athis-Mons |
| athlete | atleta |
| athlete's foot | pie de atleta |
| athletes | deportista |
| athletic | atlético |
| Athletic Bilbao | Athletic Club |
| Athletic shoe | Deportivas |
| athletics | atletismo |
| Athlitiki Enosis Konstantinoupoleos | AEK Atenas |
| Athlon | AMD Athlon |
| Athmosphere | Atmósfera terrestre |
| Atholl | Atolón |
| Athos | Athos |
| Athribis | Atribis |
| athwart | a través de |
| Athyriaceae | Woodsiaceae |
| Ati | ATI Technologies |
| ATI Technologies | ATI Technologies |
| Atia Balba Caesonia | Atia Balba Cesonia |
| Atil | Atil |
| Atimia | Atimia |
| Atiu | Atiu |
| Atizapán de Zaragoza | Atizapán de Zaragoza |
| Atkins Nutritional Approach | Dieta Atkins |
| Atkinson cycle | Ciclo Atkinson |
| Atlacamani | Atlacamani |
| Atlacoya | Atlacoya |
| Atlakviða | Atlakvida |
| Atlanta | Atlanta |
| Atlanta Braves | Atlanta Braves |
| Atlanta Falcons | Atlanta Falcons |
| Atlanta Hawks | Atlanta Hawks |
| Atlanta Thrashers | Atlanta Thrashers |
| Atlante Fútbol Club | Club de Fútbol Atlante |
| Atlantean | Atlántico |
| Atlantia | Atlantia |
| Atlantic | Atlántico |
| Atlantic bonito | Sarda sarda |
| Atlantic Charter | Carta del Atlántico |
| Atlantic City | Atlantic City |
| Atlantic Division | División Atlántico |
| Atlantic Forest | Mata Atlántica |
| Atlantic halibut | Hippoglossus hippoglossus |
