| altitude | Höhe |
| Altjeßnitz | Altjeßnitz |
| Altkalen | Altkalen |
| Altkirch | Altkirch |
| Altkirchen | Altkirchen |
| Altklarinet | Altklarinette |
| Altlandsberg | Altlandsberg |
| Altlay | Altlay |
| Altleiningen | Altleiningen |
| Altlengbach | Altlengbach |
| Altlichtenwarth | Altlichtenwarth |
| Altlußheim | Altlußheim |
| Altmannstein | Altmannstein |
| Altmark | Altmark |
| Altmark-incident | Altmark-Zwischenfall |
| Altmarkkreis Salzwedel | Altmarkkreis Salzwedel |
| Altmelon | Altmelon |
| Altmersleben | Altmersleben |
| Altmittweida | Altmittweida |
| Altmühl | Altmühl |
| Altmünster | Altmünster |
| Altnau | Altnau |
| Alto | Alt |
| Alto de El Angliru | Alto de Angliru |
| Alto Douro | Alto Douro |
| Alto Gállego | Alto Gállego |
| Alto Malcantone | Alto Malcantone TI |
| Alto Paraguay | Alto Paraguay |
| Alto Paraná | Alto Paraná |
| Altocumulus | Altocumulus |
| Altocumulus castellanus | Castellanus |
| Altocumulus lenticularis | Lenticularis |
| Altomünster | Altomünster |
| Alton | Alton |
| Altoona | Altoona |
| Altorf | Altorf |
| Altostratus | Altostratus |
| Altrei | Altrei |
| Altria Group | Altria Group |
| Altrich | Altrich |
| Altrip | Altrip |
| altruïs | Altruist |
| altruïsme | Altruismus |
| altruïst | Altruist |
| altruïste | Altruistin |
| altruïstisch | altruistisch |
| Altsaxofoon | Altsaxophon |
| Altscheid | Altscheid |
| Altschwendt | Altschwendt |
| Altshausen | Altshausen |
| Altstadt Spandau | U-Bahnhof Altstadt Spandau |
| Altstem | Altstimme |
| Altstrimmig | Altstrimmig |
| Altstätten | Altstätten |
| Altura | Höhe |
| Altusried | Altusried |
| altviolist | Bratschist |
| altviool | Bratsche |
| Altwarp | Altwarp |
| Altweidelbach | Altweidelbach |
| Altwigshagen | Altwigshagen |
| Altwiller | Altwiller |
| Altwis | Altwis |
| altzangeres | Altistin |
| Altér real | Altér Real |
| Altötting | Landkreis Altötting |
| ALU | Arithmetic Logical Unit |
| Alu-sequentie | Alu-Sequenz |
| Alucitidae | Federgeistchen |
| Aludra | Aludra |
| aluin | Alaun |
| Aluinaarde | Tonerde |
| Alula Australis | Alula Australis |
| Alula Borealis | Alula Borealis |
| Aluminiet | Aluminit |
| aluminium | Aluminium |
