| Anubisbavian | Olive Baboon |
| Anus | Anus |
| anvendelig | usable |
| anvendt ernæring | applied nutrition |
| anvendt forskning | applied research |
| Anvendt matematik | Applied mathematics |
| anvendt videnskab | applied science |
| anvendt økologi | applied ecology |
| Anwar Sadat | Anwar El Sadat |
| Anywhere But Home | Anywhere but Home |
| ANZAC | Australian and New Zealand Army Corps |
| Anzoátegui | Anzoátegui |
| ANZUS | ANZUS |
| Anæmi | Anemia |
| Anæstesi | Anesthesia |
| Anæstesiologi | Anesthesia |
| Aoede | Aoede |
| AOL | AOL |
| Aorta | Aorta |
| Aorta ascendens | Ascending aorta |
| Aosta | Aosta |
| AOX-værdi | AOX value |
| AP | AP |
| Apache | Apache |
| apalhraun | aa |
| apartheid | apartheid |
| Apate | Apate |
| apati | apathy |
| Apatity | Apatity |
| APEC | Asia-Pacific Economic Cooperation |
| Apenniniske halvø | Italian Peninsula |
| Aperitif | Peg |
| Aphex Twin | Aphex Twin |
| Apikal dominans | Apical dominance |
| APL | APL |
| Apocalypse Now | Apocalypse Now |
| Apocalypto | Apocalypto |
| Apokalyptik | Apocalypticism |
| Apokryfe skrifter | Apocryphal |
| Apolipoprotein | Apolipoprotein |
| Apollo | Apollo |
| Apollo-asteroide | Apollo asteroid |
| Apollo-programmet | Apollo program |
| Apollodor fra Athen | Apollodorus |
| Apollon | Apollo |
| Apollonia | Saint Apollonia |
| Apollonius | Apollonius of Perga |
| Apomixis | Apomixis |
| Apophis | Apep |
| Apopleksi | Stroke |
| Apoprotein | Apoprotein |
| apoptosis | apoptosis |
| apostel | apostle |
| Apostelmødet | Council of Jerusalem |
| Apostlen Andreas | Saint Andrew |
| Apostlen Peter | Saint Peter |
| Apostlenes Gerninger | Acts of the Apostles |
| apotek | pharmacy |
| apoteker | pharmacist |
| apoteksaffald | pharmaceutical waste |
| Apotemnofili | Body integrity identity disorder |
| Appalacherne | Appalachian Mountains |
| Appaloosa | Appaloosa |
| Appartement | Apartment |
| Appel | Call |
| appellativ | common noun |
| appelsin | orange |
| Appelsinkanon | Spud gun |
| appelsintræ | orange |
| Appenninerne | Apennine Mountains |
| Appetit-vækker | Appetizer |
| Appian | Appian |
| Apple | Apple |
| Apple Computer | Apple Computer |
| Apple Macintosh | Macintosh |
| Apple QuickTime | QuickTime |
| AppleTalk Filing Protocol | Apple Filing Protocol |
| Applikation | Industry |
| Applikationsserver | Application server |
| april | April |
| April Margera | April Margera |
| Aprilsnar | April Fools' Day |
| APRS | Automatic Position Reporting System |
| Apsis | Apse |
| Apu Nahasapeemapetilon | Apu Nahasapeemapetilon |
| Apulejus fra Madaura | Apuleius |
| Apulien | Apulia |
| Apure | Apure |
| Aquatlon | Aquathlon |
| Aquileia | Aquileia |
| Aquitaine | Aquitaine |
| ar | scar |
| Araber | Arab |
| araberspring | roundoff |
| Arabia Petraea | Arabia |
| arabisk | Arabic |
| Arabiske alfabet | Arabic alphabet |
| Arabiske Halvø | Arabian Peninsula |
| Arabiske Hav | Arabian Sea |
| Arabiske talsystem | Arabic numerals |
| Arado | Arado Flugzeugwerke |
| Aragonien | Aragon |
| aragonisk | Aragonese |
| Aragorn | Aragorn |
| Aragua | Aragua |
| Aralsøen | Aral Sea |
| Aram Khatjaturian | Aram Khachaturian |
| Aramid | Aramid |
| Aramæisk | Aramaic language |
| Arancón | Arancón |
| Ararats bjerg | Mount Ararat |
| Arbeiderpartiet | Norwegian Labour Party |
| Arbejd | Job |
| arbejde | work |
| Arbejdernes Andels Boligforening | AAB |
| Arbejdernes internationale kampdag | May Day |
| Arbejderparti | Labour Party |
| Arbejderpartiet | Labor Party |
| arbejdsdeling | division of labour |
| arbejdsforhold | labour relations |
| arbejdsgiver | employer |
| arbejdskraft | manpower |
| arbejdsløs | unemployed |
| arbejdsløshed | unemployment |
| arbejdsmarked | labour market |
| arbejdsmedicin | industrial medicine |
| arbejdsom | diligent |
| arbejdsplads | workplace |
| arbejdsret | labour law |
| arbejdssikkerhed | industrial safety |
| arbejdssikkerhedsregler | occupational safety regulation |
| arbejdsstilling | occupational status |
| arbejdsstyrke | labour force |
| arbejdstilladelse | work permit |
| arbejdsulykke | work accident |
| Arbi Barajev | Arbi Barayev |
| Arbil | Arbil |
| arboret | arboretum |
| Arbovirus-gruppen | Arbovirus |
| Arcade Fire | Arcade Fire |
| Arcangelo Corelli | Arcangelo Corelli |
| Arch Linux | Arch Linux |
| Archaea | Archaea |
| Archaeopteryx | Archaeopteryx |
| Arche | Arche |
| Arches Nationalpark | Arches National Park |
| Arcus aortae | Aortic arch |
| Arcussinus | Inverse trigonometric function |
| Ardabil | Ardabil Province |
| Ardea | Ardea |
| Arden Kommune | Arden municipality |
| Ardennerne | Ardennes |
| Ardenneroffensiven | Battle of the Bulge |
| Ardennes | Ardennes |
| Ardulfurataini Watan | Ardulfurataini Watan |
| Ardèche | Ardèche |
| areal | distribution area |
| arealanvendelse | landscape consumption |
| arealforvaltning og -planlægning | land management and planning |
| arealforvaltnings interventionsområde | land-management intervention area |
| arealplanlægning | land planning |
| arealudnyttelse | land occupation |
| arealudnyttelsesplan | land use plan |
| Arecibo Observatoriet | Arecibo Observatory |
| Arek Onyszko | Arkadiusz Onyszko |
| Arena Mytisjtji | Mytishchi Arena |
| Arendal | Arendal |
| Ares | Ares |
| Ares I | Ares I |
| Aretha Franklin | Aretha Franklin |
| Argenteuil | Argenteuil |
| Argentina | Argentina |
| Argentinas flag | Flag of Argentina |
| Argentinas politik | Politics of Argentina |
| Argeş | Argeş County |
| Arghakhanchi District | Arghakhanchi District |
| Argo Navis | Argo Navis |
| argon | argon |
| Argonaut | Argonaut |
| Argos | Argus |
| Argus | Argus |
| Argusblåfugl | Silver-studded Blue |
| Ariadne | Ariadne |
| Ariadne på Naxos | Ariadne auf Naxos |
| Ariane | Ariane |
| Arianisme | Arianism |
| aridt område | arid land |
| Arie | Aria |
| Ariel Ramírez | Ariel Ramírez |
| Ariel Sharon | Ariel Sharon |
| Arier | Aryan |
| Arild | Arild |
| Arild Huitfeldt | Arild Huitfeldt |
| Ariosofi | Nazi occultism |
| Aristarchos | Aristarchus of Samos |
| Aristofanes | Aristophanes |
| aristokrati | aristocracy |
| Aristokratvittigheden | The Aristocrats |
| Aristoteles | Aristotle |
| aritmetik | arithmetic |
| Aritmetikkens fundamentalsætning | Fundamental theorem of arithmetic |
| Arius | Arius |
