| Autoerotik | autoerotism |
| Automatik | automatism automatic automatic transmission |
| Autokratie | autocracy |
| Automobil | automobile car auto motorcar |
| automobil | automotive |
| Autonomie | autonomy |
| Autoradio | car radio automobile radio |
| Autorin | author writer |
| Autorität | authority |
| Autotomie | autotomy |
| Autotoxin | autotoxin |
| autoerotisch | autoerotic |
| autoritär | authoritarian |
| Antarktik | Southern Ocean |
| Aporetik | aporetic |
| Autistin | autist |
| Autoblock | autoblock |
| Autarkie | autarky self-sufficiency |
| Autobombe | car bomb |
| Autocross | autocross |