| Autozoom | autozoom |
| Autodrom | motor-racing circuit dodgems track bumper car dodgem |
| Autosom | autosome |
| autonom | autonomous self-governed |
| Autochrom | autochrome |
| autogam | autogamous |
| Autoblock | autoblock |
| auto- | self- auto- |
| Auto | car motor car auto order resolution writ |
| Autobahn | motorway freeway highway interstate highway |
| Autobombe | car bomb |
| Autobus | bus coach motorbus |
| Autocar | bus |
| Autocross | autocross |
| Autocue | autocue |
| Autodafé | auto-da-fé |
| Autodieb | car thief |
| Autoerotik | autoerotism |
| Autofokus | autofocus |
| Autogiro | autogyro autogiro |