| armonizar | accostare |
| armonía | corrispondenza |
| armonía vocálica | armonia vocalica |
| Armoy | Armoy |
| Armstrong | Armstrong |
| Army Of Me | Army of Me |
| Armónic | Armoniche |
| armónica | armonica |
| armónica de cristal | armonica a bicchieri |
| armónico | in armonia |
| Armónicos esféricos | Armoniche sferiche |
| Armórica | Armorica |
| ARN | RNA |
| ARN de transferencia | RNA transfer |
| ARN interferente | RNA interference |
| ARN interferente pequeño | Short interfering RNA |
| ARN mensajero | RNA messaggero |
| ARN polimerasa | RNA polimerasi |
| ARN ribosómico | RNA ribosomiale |
| Arnac-Pompadour | Arnac-Pompadour |
| Arnaldo de Brescia | Arnaldo da Brescia |
| Arnaldo Forlani | Arnaldo Forlani |
| Arnau de Villanova | Arnaldo da Villanova |
| Arnaut Daniel | Arnaut Daniel |
| Arnay-le-Duc | Arnay-le-Duc |
| Arne Friedrich | Arne Friedrich |
| Arne Wilhelm Kaurin Tiselius | Arne Tiselius |
| Arnex-sur-Nyon | Arnex-sur-Nyon |
| Arnex-sur-Orbe | Arnex-sur-Orbe |
| Arnhem | Arnhem |
| Arni bei Biglen | Arni |
| Arnica montana | Arnica montana |
| Arno | Arno |
| Arno Allan Penzias | Arno Penzias |
| Arnold Böcklin | Arnold Böcklin |
| Arnold Rüütel | Arnold Rüütel |
| Arnold Schwarzenegger | Arnold Schwarzenegger |
| Arnold Schönberg | Arnold Schönberg |
| Arnold Sommerfeld | Arnold Sommerfeld |
| Arnold van Gennep | Arnold Van Gennep |
| Arnoldo Janssen | Arnold Janssen |
| Arnolfo di Cambio | Arnolfo di Cambio |
| Arnor | Arnor |
| Arnoya | A Arnoia |
| ARNr | rRNA |
| Arnstadt | Arnstadt |
| Arnuanda II | Arnuwanda II |
| Arnuanda III | Arnuwanda III |
| Arnulfo de Carintia | Arnolfo di Carinzia |
| Arnéguy | Arnéguy |
| aro | aro |
| aro del émbolo | fascia elastica |
| Arogno | Arogno |
| aroma | aroma |
| aromatizante | aroma |
| aromatizantes | aroma |
| aromático | aromatico |
| Aron Nimzowitsch | Aaron Nimzowitsch |
| Arona | Arona |
| Arosa | Arosa |
| Aroue-Ithorots-Olhaïby | Aroue-Ithorots-Olhaïby |
| Around the Sun | Around the Sun |
| ARP | ARP |
| arpa | arpa |
| Arpa celta | Arpa celtica |
| Arpa de boca | Scacciapensieri |
| ARPANET | ARPANET |
| arpegio | arpeggio |
| arpeo | rampino |
| ARPG | Action RPG |
| arpillera | sacco |
| ARPU | ARPU |
| arpía | vecchiaccia |
| arpón | arpione |
| arqueado | arcato |
| arquearse | curvarsi |
| Arqueoastronomía | Archeoastronomia |
| arqueología | archeologia |
| Arqueología bíblica | Archeologia biblica |
| Arqueología industrial | Archeologia industriale |
| Arqueología Medieval | Archeologia medievale |
| arqueológico | archeologico |
| Arqueoptérix | Archaeopteryx lithographica |
| Arqueosofía | Archeosofia |
| arquera | arciere |
| arquero | arciere |
| Arquero a caballo | Arcieri a cavallo |
| arquetipo | archetipo |
