| Arequipa | Arequipa |
| Ares | Ares |
| Ares I | Ares I |
| Ares V | Ares V |
| Aresing | Aresing |
| areszt | arrest |
| areszt domowy | house arrest |
| Aresztowaă | Nick |
| Aretas | Aretas |
| Aretas IV | Aretas IV Philopatris |
| Arete | Arete |
| Aretha Franklin | Aretha Franklin |
| Arette | Arette |
| Aretuza | Portuguese man-of-war |
| Arezzo | Arezzo |
| Arfachsad | Arpachshad |
| Arfud | Erfoud |
| Argali ałtajski | Argali |
| Arganchy | Arganchy |
| Argea | Argea |
| Argeadzi | Argead dynasty |
| Argelès-Gazost | Argelès-Gazost |
| Argelès-sur-Mer | Argelès-sur-Mer |
| Argenbühl | Argenbühl |
| Argences | Argences |
| argentan | German silver |
| Argentat | Argentat |
| Argentavis magnificens | Argentavis |
| Argenteuil | Argenteuil |
| Argenteum Astrum | A∴A∴ |
| Argenteus | Argenteus |
| Argentine | Argentina |
| Argentino | Lake Argentino |
| Argentinos Juniors Buenos Aires | Argentinos Juniors |
| Argentières | Argentières |
| Argenton-sur-Creuse | Argenton-sur-Creuse |
| Argentré-du-Plessis | Argentré-du-Plessis |
| Argentyna | Argentina |
| Argentynozaur | Argentinosaurus |
| Argentyńska gorączka krwotoczna | Argentine hemorrhagic fever |
| argentyński | Argentinian |
| Argeş Piteşti | FC Argeş Piteşti |
| Argis | Argis |
| Argo | Argo |
| Argolida | Argolis |
| argon | argon |
| Argonath | Argonath |
| Argonauci | Argonauts |
| Argonauta | Argonaut |
| Argos | Argus |
| Argostolion | Argostoli |
| argotyzm | argot |
| Argowia | Aargau |
| Arguin | Arguin |
| argument | argument |
| Argument kosmologiczny | Cosmological argument |
| Argument szerokości perycentrum | Argument of periapsis |
| Argument teleologiczny | Teleological argument |
| Argumentum ad baculum | Argumentum ad baculum |
| Argumentum ad hominem | Ad hominem |
| Argumentum ad ignorantiam | Argument from ignorance |
| Argumentum ad misericordiam | Appeal to pity |
| Argumentum ad populum | Argumentum ad populum |
| Argumentum ad verecundiam | Appeal to authority |
| Argus malajski | Great Argus |
| Argusowate | Scatophagidae |
| Arguń | Argun River |
| Argy | Argis |
| Argyll | Argyll |
| Argyll and Bute | Argyll and Bute |
| Argyreia nervosa | Hawaiian baby woodrose |
| Arhansus | Arhansus |
| Ari Pekka Nikkola | Ari-Pekka Nikkola |
| Ari Þorgilsson | Ari Þorgilsson |
| aria | aria |
| Aria Giovanni | Aria Giovanni |
| Ariadna | Ariadne |
| Ariadna Oliver | Ariadne Oliver |
| Ariane | Ariane |
| Arianespace | Arianespace |
| Arianizm | Arianism |
| Ariano Irpino | Ariano Irpino |
| Arianrhod | Arianrhod |
| Ariary | Malagasy ariary |
| ariański | Arian |
| Ariclenes da Silva Ferreira | Ariclenes da Silva Ferreira |
| Arie Eldad | Aryeh Eldad |
| Ariel Ortega | Ariel Ortega |
| Ariel Ramírez | Ariel Ramírez |
| Ariel Sharon ma zapalenie płuc | Former Israeli prime minister Ariel Sharon develops double pneumonia |
| Ariel Sharon miał zapalenie płuc | Former Israeli prime minister Ariel Sharon develops double pneumonia |
| Ariel Szaron | Ariel Sharon |
| Arietydy | Arietids |
| Arija | Aria |
| Arik Einstein | Arik Einstein |
| Arik-den-ili | Arik-den-ili |
| Arikara | Arikara |
| Arioald | Arioald |
| Arion | Arion |
| Ariowie | Aryan |
| Ariowist | Ariovistus |
| Ariozofia | Nazi occultism |
| Arirang | Arirang |
| Arirania | Giant Otter |
| Aris Bonnevoie | FC Aris Bonnevoie |
| Aris Saloniki | Aris FC |
| Aristajos | Aristaeus |
| Aristander z Telmessos | Aristander |
| Aristarch Biełopolski | Aristarkh Apollonovich Belopolsky |
| Aristeion | Aristeion Prize |
| Aristide Briand | Aristide Briand |
| Aristides Gomes | Aristides Gomes |
| Aristides Pereira | Aristides Pereira |
| Aristomachus | Aristomachus |
| Aristozuch | Aristosuchus |
| Arisz | Arish |
| Ariusowate | Ariidae |
| Ariusz | Arius |
| Arizona | Arizona |
| Arizona Barker | Ma Barker |
| Arizona Cardinals | Arizona Cardinals |
| Arizona Diamondbacks | Arizona Diamondbacks |
| Arizona Dream | Arizona Dream |
| Ariège | Ariège |
| Ariégeois | Ariegeois |
| ARJ | ARJ |
| Arjadewa | Aryadeva |
| Arjan Beqaj | Arjan Beqaj |
| Arjana | Aryanah |
| Arjen Lucassen | Arjen Anthony Lucassen |
| Arjen Robben | Arjen Robben |
| Arjuna - córka Ziemi | Earth Maiden Arjuna |
| Ark Linux | Ark Linux |
| arka | ark |
| Arka Noego | Noah's Ark |
| Arka Przymierza | Ark of the Covenant |
| arkada | arcade |
| Arkadi Ghukasjan | Arkadi Ghukasyan |
| Arkadia | Arcadia |
| Arkadij i Borys Strugaccy | Arkady and Boris Strugatsky |
| Arkadij Naiditsch | Arkadij Naiditsch |
| Arkadij Wołodos | Arcadi Volodos |
| Arkadiusz | Arcadius |
| Arkadiusz Malarz | Arkadiusz Malarz |
| Arkadiusz Onyszko | Arkadiusz Onyszko |
| Arkady Fiedler | Arkady Fiedler |
| Arkansas | Arkansas |
| Arkałyk | Arkalyk |
| arkebuz | arquebus |
| Arkefly | Arkefly |
| Arkezylaos | Arcesilaus |
| Arkham | Arkham |
| Arkham Asylum | Arkham Asylum |
| Arkia | Arkia Israel Airlines |
| Arkologia | Arcology |
| Arkona | Cape Arkona |
| Arktur | Arcturus |
| Arktyka | Arctic |
| arkusz | sheet |
| arkusz kalkulacyjny | spreadsheet |
| Arlay | Arlay |
| Arlberg | Arlberg |
| Arlekin i walentynki | Harlequin Valentine |
| arlekinada | horseplay |
| Arles | Arles |
| Arlette Laguiller | Arlette Laguiller |
| Arleux-en-Gohelle | Arleux-en-Gohelle |
| Arlit | Arlit |
| Arlon | Arlon |
| ARM Cuauhtémoc | Cuauhtémoc |
| Arma Christi | Arma Christi |
| Armada Rijeka | Armada Rijeka |
| Armageddon | Armageddon |
| Armagedon | Armageddon |
| Armagetron | Armagetron Advanced |
| Armagh | Armagh |
| Armagnac | Armagnac |
| Armand Assante | Armand Assante |
| Armand Barbès | Armand Barbès |
| Armand Caulaincourt | Armand Augustin Louis de Caulaincourt |
| Armand Fallières | Armand Fallières |
| Armand Fizeau | Hippolyte Fizeau |
| Armand Gaétan Razafindratandra | Armand Razafindratandra |
| Armand Gensonné | Armand Gensonné |
| Armand Jean Richelieu | Cardinal Richelieu |
| Armand van Helden | Armand Van Helden |
| Armando Guebuza | Armando Guebuza |
| armata | gun |
| Armata czołgowa | Tank gun |
| Armata przeciwpancerna | Anti-tank warfare |
