| Armoriale | Roll of arms |
| Armoriale dei cantoni svizzeri | Flags of Swiss cantons |
| Armorica | Armorica |
| Armoy | Armoy |
| ARMP | RAPM |
| Armstrong | Armstrong |
| Army Ballistic Missile Agency | Army Ballistic Missile Agency |
| Army of Me | Army of Me |
| Army One | Army One |
| ARN | ARN |
| Arnac-Pompadour | Arnac-Pompadour |
| Arnaia | Arnaia |
| Arnaldo da Brescia | Arnold of Brescia |
| Arnaldo da Villanova | Arnaldus de Villa Nova |
| Arnaldo Forlani | Arnaldo Forlani |
| Arnaut Daniel | Arnaut Daniel |
| Arnay-le-Duc | Arnay-le-Duc |
| Arnbruck | Arnbruck |
| Arne Friedrich | Arne Friedrich |
| Arne Tiselius | Arne Tiselius |
| Arneb | Alpha Leporis |
| Arneburg | Arneburg |
| Arnefrido | Arnefrit of Friuli |
| arnese | instrument |
| Arnex-sur-Nyon | Arnex-sur-Nyon |
| Arnex-sur-Orbe | Arnex-sur-Orbe |
| Arnhem | Arnhem |
| Arnhem Land | Arnhem Land |
| arnia | beehive |
| arnica | arnica |
| Arnica montana | Arnica montana |
| Arnione | Kidney |
| Arno | Arno River |
| Arno Penzias | Arno Allan Penzias |
| Arnobio | Arnobius |
| Arnold | Arnaud |
| Arnold Böcklin | Arnold Böcklin |
| Arnold de Lantins | Arnold de Lantins |
| Arnold Geulincx | Arnold Geulincx |
| Arnold Janssen | Arnold Janssen |
| Arnold Rüütel | Arnold Rüütel |
| Arnold Schwarzenegger | Arnold Schwarzenegger |
| Arnold Schönberg | Arnold Schoenberg |
| Arnold Sommerfeld | Arnold Sommerfeld |
| Arnold Van Gennep | Arnold van Gennep |
| Arnoldo di Selenhofen | Arnold of Selenhofen |
| Arnoldo Mondadori Editore | Arnoldo Mondadori Editore |
| Arnoldstein | Arnoldstein |
| Arnolfo di Cambio | Arnolfo di Cambio |
| Arnolfo di Carinzia | Arnulf of Carinthia |
| Arnor | Arnor |
| Arnouville | Arnouville |
| Arnsberg | Arnsberg |
| Arnschwang | Arnschwang |
| Arnstadt | Arnstadt |
| Arnstein | Arnstein |
| Arnstorf | Arnstorf |
| Arnutovce | Arnutovce |
| Arnuwanda II | Arnuwanda II |
| Arnuwanda III | Arnuwanda III |
| Arnéguy | Arnéguy |
| aro | arum |
| Arodingi | Haroldingians |
| Arogno | Arogno |
| Aroldo I di Danimarca | Harald I of Denmark |
| Aroldo in Italia | Harold en Italie |
| aroma | aroma |
| Aromaticità | Aura |
| aromatico | aromatic |
| aromatizzare | spice |
