| autotrasporto | hauling |
| autotreno per trasporto auto | transporter |
| Autotrofia | Autotroph |
| autovalore | eigenvalue |
| autoveicolo | car |
| autovettore | eigenvector |
| autovettura | car |
| autrice | author |
| Autruche | Ostrich |
| Autumn in New York | Autumn in New York |
| Autun | Autun |
| autunnale | autumnal |
| autunno | fall |
| Autunno del Medioevo | The Autumn of the Middle Ages |
| Auty | Auty |
| autòma | vending machine |
| Auvernaux | Auvernaux |
| Auvers-sur-Oise | Auvers-sur-Oise |
| Auvillars | Auvillars |
| Aux-Aussat | Aux-Aussat |
| Auxerre | Auxerre |
| Auxey-Duresses | Auxey-Duresses |
| Auxi-le-Château | Auxi-le-Château |
| Auxiliary Power Unit | Auxiliary power unit |
| Auxonne | Auxonne |
| Auxotrofia | Auxotrophy |
| Auzon | Ozone |
| Außernzell | Außernzell |
| Auðhumla | Auðumbla |
| Auðr | Auðr |
| Av | Av |
| ava | ancestress |
| Ava Gardner | Ava Gardner |
| Avaceratops lammersi | Avaceratops |
| Avahi | Woolly lemur |
| Availles-sur-Seiche | Availles-sur-Seiche |
| Avajan | Avajan |
| avallare | guarantee |
| avallo | guarantee |
| Avallon | Avallon |
| Avalokitesvara | Avalokiteśvara |
| Avalon | Avalon |
| avambraccio | forearm |
| avamposto | outpost |
| avana | Havana |
