| ARCNET | ARCnet |
| Arcology | Arcologie |
| Arconciel | Arconciel |
| Arcore | Arcore |
| Arcot | Arkât |
| Arctic | Arctique |
| Arctic Cape | Cap Arctique |
| Arctic Cathedral | Cathédrale Arctique |
| Arctic char | Omble chevalier |
| Arctic Circle | Cercle Arctique |
| Arctic Council | Conseil arctique |
| Arctic ecosystem | écosystème arctique |
| Arctic fox | Renard polaire |
| Arctic grayling | Ombre commun |
| Arctic Ground Squirrel | Spermophilus parryii |
| Arctic hill | Tunturi |
| Arctic Ocean | Océan Arctique |
| Arctic Warbler | Pouillot boréal |
| Arctic Wolf | Loup arctique |
| Arctic Zone | Arctique |
| Arctica islandica | Arctica islandica |
| Arctiidae | Arctiidae |
| Arctiinae | Arctiinae |
| Arctinus of Miletus | Arctinos de Milet |
| Arctocephalus | Arctocephalus |
| Arctotheca calendula | Arctotheca |
| Arctotis | Arctotis |
| Arcturus | Alpha Bootis |
| Arcueil | Arcueil |
| Arcul de Triumf | Arcul de Triumf |
| Arcus Argentariorum | Arc de Septime Sévère |
| Arcus senilis | Gérontoxon |
| Arda | Arda |
| Arda River | Arda |
| Ardabil | Ardabil |
| Ardahan Province | Ardahan |
| Ardalan | Ardalan |
| Ardaric | Ardaric |
| Ardashir I | Ardachîr Ier |
| Ardashir II | Ardachîr II |
| Ardashir III | Ardachir III |
| Ardatov | Ardatov |
| Ardea | Ardeidae |
| Ardea alba | Grande aigrette |
| Ardeatine massacre | Massacre des fosses ardéatines |
| Arden | Arden |
| Arden municipality | Arden |
| Ardennes | Ardennes |
| ardent | fervent |
| Ardeshir | Ardachîr |
| Ardez | Ardez |
| Ardhanari | Ardhanari |
| Ardillières | Ardillières |
| Ardino | Ardino |
| Ardipithecus | Ardipithèque |
| Arditti Quartet | Quatuor Arditti |
| Ardmore | Ardmore |
| Ardo | Ardo |
| Ardon | Ardon |
| ardor | ardeur |
| Ardres | Ardres |
| Ardres-en-Calaisis | Ardres-en-Calaisis |
| Arduin of Italy | Arduin d’Ivrée |
| arduous | difficile |
| arduousness | peine |
