| aristocracia | aristocracy |
| Aristocracia obrera | Labor aristocracy |
| aristocráticamente | aristocratically |
| aristocrático | aristocratic |
| Aristodemo | Aristodemus |
| Aristolochia | Aristolochia |
| Aristolochia clematitis | Aristolochia clematitis |
| Aristolochia littoralis | Aristolochia littoralis |
| Aristolochiaceae | Aristolochiaceae |
| Aristosuchus | Aristosuchus |
| Aristoxeno | Aristoxenus |
| Aristágoras | Aristagoras |
| Aristóbulo de Casandrea | Aristobulus of Cassandreia |
| Aristóbulo I | Aristobulus |
| Aristóbulo II | Aristobulus II |
| aristócrata | aristocrat |
| Aristófanes | Aristophanes |
| Aristófanes de Bizancio | Aristophanes of Byzantium |
| Aristóteles | Aristotle |
| Aristóteles Onassis | Aristotle Onassis |
| aritmometro | calculator |
| aritmética | arithmetic |
| Aritmética modular | Modular arithmetic |
| aritméticamente | arithmetically |
| aritmético | arithmetic |
| arito | earring |
| Arive | Aribe |
| arizado | frizzy |
| Arizona | Arizona |
| Arizona Cardinals | Arizona Cardinals |
| Arizona Dream | Arizona Dream |
| Ariège | Ariège |
| Arión | Arion |
| ARJ | ARJ |
| Arjen Lucassen | Arjen Anthony Lucassen |
| Arjen Robben | Arjen Robben |
| Arjuna | Arjuna |
| Arjánguelsk | Arkhangelsk |
| Arjé | Arche |
| Ark Linux | Ark Linux |
| Arkadi y Borís Strugatsky | Arkady and Boris Strugatsky |
| Arkady Gaidamak | Arcadi Gaydamak |
| Arkan | Željko Ražnatović |
| Arkansas | Arkansas |
| Arkham | Arkham |
| Arkia | Arkia Israel Airlines |
| Arlberg | Arlberg |
| Arleen Augér | Arleen Auger |
| arlequín | harlequin |
| Arlequín Enamorado | Harlequin Valentine |
| Arlon | Arlon |
| Arlés | Arles |
| ARM | ARM architecture |
| arma | gun |
| arma atómica | nuclear weapon |
| arma bacteriológica | biological weapon |
| Arma biológica | Biological warfare |
| arma de destrucción masiva | weapon of mass destruction |
| arma de doble filo | double-edged sword |
| arma de dos filos | double-edged sword |
| Arma de electrochoque | Electroshock weapon |
| arma de fuego | gun |
| arma de fuego a repetición | repeater |
| arma nuclear | nuclear weapon |
| arma química | chemical weapon |
| Arma semiautomática | Semi-automatic firearm |
| armada | armada |
