| Ar-Rachid | Al-Rashid |
| Ar-Raqqa | Ar-Raqqah |
| ara | macaw |
| Ara bleu | Blue-and-yellow Macaw |
| Ara chloroptère | Green-Winged Macaw |
| Ara de Illiger | Blue-winged Macaw |
| Ara de Lafresnaye | Red-fronted Macaw |
| Ara glauque | Glaucous Macaw |
| Ara hyacinthe | Hyacinth Macaw |
| Ara macao | Scarlet Macaw |
| Ara macavouanne | Red-bellied Macaw |
| Ara militaire | Military Macaw |
| Ara sévère | Chestnut-fronted Macaw |
| Ara à collier jaune | Golden-collared Macaw |
| Ara à gorge bleue | Blue-throated Macaw |
| Arab Air Carriers Organization | Arab Air Carriers Organization |
| Arab Radio and Television Network | Arab Radio and Television Network |
| Arabah | Arabah |
| Arabe | Arab |
| arabe classique | Classical Arabic |
| Arabe dialectal | Varieties of Arabic |
| arabe littéral | Fus-ha |
| arabe standard | Fus-ha |
| arabe tunisien | Tunisian Arabic |
| arabe égyptien | Egyptian Arabic |
| Arabes | Arab |
| Arabes américains | Arab American |
| Arabes chrétiens | Arab Christians |
| Arabes israéliens | Arab citizens of Israel |
| Arabette | Arabis |
| Arabette des Alpes | Arabis alpina |
| Arabette des dames | Arabidopsis thaliana |
| Arabidopsis | Arabidopsis |
| Arabie | Arabian Peninsula |
| Arabie Saoudite | Saudi Arabia |
| Arabie Séoudite | Saudi Arabia |
| Arabika | Arabika Massif |
| Arabinose | Arabinose |
| Arabique | Arabian |
| arabisant | Arabist |
| arabisante | Arabist |
| Arabisation | Arabization |
| arable | arable |
| Aracaju | Aracaju |
| Araceae | Araceae |
| arachide | peanut |
| Arachne | Shelob |
| Arachnida | Arachnid |
| arachnide | arachnid |
| arachnides | arachnids |
| Arachnoïde | Arachnoid mater |
| arachnoïdien-ne | filamentous |
| Arachné | Arachne |
| arachnéen | spidery |
| Arachosie | Arachosia |
| Aradac | Aradac |
| Araeoscelidia | Araeoscelidia |
| Aragami | Aragami |
| Aragats | Mount Aragats |
| Aragatsotn | Aragatsotn |
| Aragon | Aragon |
| Aragonais | Aragonese language |
| Aragorn | Aragorn |
| Aragua FC | Aragua Fútbol Club |
| Arahuay | Arahuay District |
| araignée | spider |
| Araignée de mer | Maja squinado |
| araignée des jardins | diadem spider |
| araignée d’eau | water strider |
| Araignée rouge | Tetranychus urticae |
| Araire | Scratch-plough |
| Araitz | Araitz |
| arak | arrack |
| Arakaldo | Arakaldo |
| Arakan | Rakhine State |
| Arakil | Arakil |
| Aral AG | Aral AG |
| Arales | Arales |
| Aralia | Aralia |
| Aralia elata | Aralia elata |
| Araliaceae | Araliaceae |
| Aralosaurus | Aralosaurus |
| Aralé | Arale Norimaki |
| Aram Asatryan | Aram Asatryan |
| Aram Ier Keshishian | Aram I |
| Aram Khatchatourian | Aram Khachaturian |
| Aramaio | Aramayona |
| Aramark Corporation | ARAMARK |
| Arame | Aramu |
| Aramide | Aramid |
| Aramil | Aramil |
| Aramis | Aramis |
| Aramits | Aramits |
| Aramé | Arame |
| Araméen | Aramaic language |
| Araméen samaritain | Samaritan Aramaic language |
| Araméens | Aramaeans |
| Aramón Cerler | Cerler |
| Aramón Formigal | Formigal |
| Aramón Panticosa | Panticosa-Los Lagos |
| Aran | Aran |
| Aranais | Aranese language |
| Aranc | Aranc |
| Arancou | Arancou |
| Arancón | Arancón |
| Araneae | Spider |
| Araneidae | Orb-weaver spider |
| Araneomorphae | Araneomorphae |
| Araneus | Araneus |
| Araneus alsine | Araneus alsine |
| Araneus quadratus | Araneus quadratus |
| Araniella cucurbitina | Cucumber green spider |
| Aranjuez | Aranjuez |
| Aranno | Aranno |
| Arantxa Parra Santonja | Arantxa Parra Santonja |
| Arantxa Sánchez Vicario | Arantxa Sánchez Vicario |
| Arantza | Arantza |
| Arantzazu | Arantzazu |
| Aranuka | Aranuka |
| Aranyakas | Aranyaka |
| Aranđelovac | Aranđelovac |
| Arapaho | Arapaho |
| Ararat | Ararat |
| Ararat Erevan | FC Ararat Yerevan |
| Arash | Arash |
| Arathorn | Arathorn II |
| Aratinga | Aratinga |
| Aratinga acuticaudata | Blue-crowned Parakeet |
| Aratinga cactorum | Cactus Parakeet |
| Aratinga canicularis | Orange-fronted Parakeet |
| Aratinga erythrogenys | Red-masked Parakeet |
| Aratinga holochlora | Green Parakeet |
| Aratinga leucophthalmus | White-eyed Conure |
| Aratinga weddellii | Dusky-headed Parakeet |
| Arator | Arator |
| Aratos de Sicyone | Aratus of Sicyon |
| Aratos de Soles | Aratus |
| Aratta | Aratta |
| Arauca | Arauca Department |
| Araucana | Araucana |
| Araucaria du Chili | Araucaria araucana |
| Araucariaceae | Araucariaceae |
| Araux | Arreau |
| Aravane Rezaï | Aravane Rezaï |
| Arawaks | Arawak |
| Araxe | Aras River |
| arbalète | crossbow |
| arbalétrier | crossbowman |
| Arbaz | Arbaz |
| Arbedo-Castione | Arbedo-Castione |
| Arbellara | Arbellara |
| Arbelos | Arbelos |
| Arbent | Arbent |
| Arberg | Arberg |
| Arbignieu | Arbignieu |
| Arbigny | Arbigny |
| Arbin | Arbin |
| arbitrage | arbitrage |
| Arbitrages de Vienne | Vienna Awards |
| arbitraire | high-handed |
| arbitre | judge |
| Arbitre principal | Head judge |
| arbitrer | arbitrate |
| Arbogast | Arbogast |
| Arbogast de Strasbourg | Saint Arbogast |
| Arbois | Arbois |
| Arboldswil | Arboldswil |
| Arbon | Arbon |
| Arbonne | Arbonne |
| Arbonne-la-Forêt | Arbonne-la-Forêt |
| Arborescence | Tree |
| arboretum | arboretum |
| arboricole | arboreal |
| arboriculture | arboriculture |
| Arboriculture fruitière | Fruit tree pruning |
| Arborimus | Tree vole |
| Arbouet-Sussaute | Arbouet-Sussaute |
| arbouse | arbutus-berry |
| Arbousier | Arbutus |
| Arbovirus | Arbovirus |
| arbre | axle |
| Arbre ashoka | Ashoka tree |
| Arbre B | B-tree |
| Arbre bicolore | Red-black tree |
| Arbre blanc du Gondor | White Tree of Gondor |
| Arbre bouteille | Pachypodium lealii |
| Arbre couvrant de poids minimal | Minimum spanning tree |
| arbre de beaupré | bowsprit |
| arbre de distribution | camshaft |
| arbre de haute futaie | forest-tree |
| Arbre de Jessé | Tree of Jesse |
| Arbre de Judée | Cercis siliquastrum |
| Arbre de la connaissance du bien et du mal | Tree of Knowledge of Good and Evil |
| Arbre de la liberté | Liberty pole |
| arbre de Noël | Christmas tree |
| Arbre de Pythagore | Pythagoras tree |
| Arbre de soie | Albizia julibrissin |
| Arbre de Steiner | Steiner tree |
| Arbre de Stern-Brocot | Stern-Brocot tree |
