| Arboucave | Arbovirus | Arbroath Abbey |
| Arbroathska opatija | Arbter | Arbun |
| Arbutus unedo | Arc de Triomphe du Carrousel | Arc-et-Senans |
| Arca di San Domenico | Arca zebra | Arcachon |
| Arcadio María Larraona Saralegui | Arcangelo Corelli | ArcelorMittal |
| Arch Enemy | Arch enemy | Arch Linux |
| Archaea | Archaeognatha | Archaeopteryx |
| Archaeopteryx lithographica | Archaeorrhyncha | Archbishop Makarios |
| Archer | Archiac | Archiacanthocephala |
| Archibald Armar Montgomery-Massingberd | Archibald Arnold | Archibald Bentley Beauman |
| Archibald Bower | Archibald Campbell Munro | Archibald Cochrane |
| Archibald Cochrane (kapitan) | Archibald Cochrane (kontraadmiral) | Archibald Cochrane, 9th Earl of Dundonald |
| Archibald Douglas Cochrane | Archibald Edward Nye | Archibald Geikie |
| Archibald Gracie IV | Archibald Gracie IV. | Archibald Henderson |
| Archibald Hill | Archibald Hutcheson | Archibald James Halkett Cassels |
| Archibald Jenks | Archibald Leitch | Archibald Little |
| Archibald Maxwell Craig | Archibald Montgomery-Massingberd | Archibald N. Jenks |
| Archibald Nathaniel Jenks | Archibald Nye | Archibald Percival Wavell, 1st Earl Wavell |
| Archibald Scott Couper | Archibald Sholto George Douglas | Archibald V. Arnold |
| Archibald Vincent Arnold | Archibald Vivian Hill | Archibald Wavell |
| ArchiCAD | Archicad | Archie Hahn |
| Archie Jewell | Archie Nathaniel Jenks | Archie Scott Brown |
| Archie Scott-Brown | Archiearis parthenias | Archiginnasio, Bologna |
| Archimede Mischi | Archimede Rosa | Architeuthidae |
| Architeuthis | ARCHOS 101 | Archos 101 |
| Archos 101 Internet Tablet | ARCHOS 101 internet tablet | Archos 101 Internet tablet |
| Arcis-sur-Aube | Arclin | Arcmin |
| Arcoverde | Arcsec | Arctia villica |
| Arctic Monkeys | Arctocephalus pusillus | Arctodus |
| Arctodus simus | Arctodus Simus Yukonensis | Arctogadus glacialis |
| Arctostaphylos uva-ursi | Arcus | Arcutanov |
| Arda | Arda (razločitev) | Arda (reka) |
| Arda Armenska | Arda, Rodopi | Ardašir I. |
| Ardašir II. | Ardabur | Ardagh |
| Ardahan (provinca) | Ardahšir I. | Ardahšir II. |
| Ardal | Ardant | Ardarik |
| Ardèche | Ardèche (departma) | Ardèche (reka) |
| Ardbeg | Ardea alba | Ardea goliath |
| Ardea nycticorax | Ardea purpurea | Ardeche |
| Ardeidae | Ardem Patapoutian | Arden |
| Ardeni | Ardennes (département) | Ardennes (departma) |
| Ardenska bitka | Ardenska kampanja (1944) | Ardenska ofenziva |
| Ardenska ofenziva (1944) | Ardent (razločitev) | Ardentes |
| Ardeotis arabs | Ardeotis kori | Ardiejci |
| Ardijejci | Arditi | Ardito Desio |
| Ardro | Ardro pod Velikim Trnom | Ardro pri Raki |
| ARDS | Arduino | Ardwick A.F.C. |
| Are | Area 51 | Arebati |
| Arebica | Aredhel | Aredhel Ar-Feiniel |
| Aredolpona rubra | Aregno | Areh |
| Areja | Arena | Arena (TV-oddaja) |
| Arena Žalgiris | Arena Gardens | Arena Gliwice |
| Arena Petrol | Arena Spaladium | Arena Stožice |
| Arenal | Arenaria ciliata | Arenaviridae |
| Arenavirus | Arenavirusi | Arend Joan Rutgers |
| Arendal | Arendt | Arengosse |
| Areni | Arenicola marina | Arensnufis |
| Areola | Areometer | Areopag |
| Areopagus | Arequipa | Ares |
| Ares I | Ares V | Areta |
| Aretacija | Aretha Franklin | Aretha Louise Franklin |
| Arethusa (razločitev) | Areva | Arezzo |
| Arezzo (pokrajina) | ARFF | Arfova invarianta |
| Arg | Argan | Argandov diagram |
| Argandova ravnina | Argania sideroxylon | Argania spinosa |
| Arganija | Arganovo drevo | ARGD |
| Argeş (reka) | Argeș (reka) | Argel Fucks |
| Argelander | Argelès-Gazost | Argeles-Gazost |
| Argelos, Landes | Argelouse | Argent-sur-Sauldre |
| Argentan | Argentat | Argentavis |
| Argentavis magnificens | Argenteuil | Argenteus |
| Argentina | Argentina Menis | Argentinci |
| Argentine | Argentinska doga | Argentinska nogometna reprezentanca |
| Argentinska republika | Argentinski oslič | Argentinski park, Ljubljana |
| Argentinski tango | Argentinski zobotrebec | Argentinsko jezero |
| Argentit | Argento | Argenton-sur-Creuse |
| Argentré-du-Plessis | Argentre-du-Plessis | Arghus |
| Arghus Soares Bordignon | Argišti I. | Arginin |
| Arginin alfaketoglutarat | Arginin-vazopresin | Argio Sabadin |
| Argiope bruennichi | Argiope lobata | Argiope mascordi |
| Argipresin | Argirija | Argiusta-Moriccio |
| Argo | Argo (zvrst jezika) | Argo jezik |
| ARGO S.p.A. | Argo, Alabama | Argolida |
| Argon | Argon (razločitev) | Argon (razločitvena stran) |
| Argonavti | Argonavtska konferenca | Argonov fluorohidrid |
| Argonove anorganske spojine | Argos | Argos (mesto) |
| Argos (mitologija) | Argot | Argulidae |
| Arguloida | Argument | Argument (logika) |
| Argument periapside | Argument periastrona | Argument perigeja |
| Argument perihelija | Argument prisončja | Argument prizemlja |
| Argun | Argun, Azija | Argun, Čečenija |
| Argun, Rusija | Argus (razločitev) | Argus Filch |
| Argutit | Argyll (razločitev) | Argynnis adippe |
| Argynnis aglaja | Argynnis niobe | Argynnis paphia |
| Argyresthia fundella | Argyroneta | Argyroneta aquatica |
| Arh | Arha (luna) | Arhaična doba |
| Arhaična Grčija | Arhaični Homo sapiens | Arhaični homo sapiens |
| Arhaik | Arhaizem | Arhangel (razločitev) |
| Arhangelsk | Arhangelska oblast | Arhangelski Ar-2 |
| Arhar | Arhebakterija | Arhegonij |
