| Autoatlas | road atlas |
| Autoabgas | car exhaust |
| Autoklav | autoclave |
| Autobus | bus coach motorbus |
| Autocar | bus |
| Autocross | autocross |
| Autofokus | autofocus |
| Autograf | autograph |
| Autohaus | car dealer car dealership |
| Autokatalyse | autocatalysis |
| Autokrat | autocrat |
| Autolyse | autolysis |
| Automat | vending machine |
| Automatik | automatism automatic automatic transmission |
| Automation | automation |
| Automixis | automixis |
| Autopilot | autopilot automatic pilot |
| Autorität | authority |
| Autostopp | hitch-hiking autostop |
| Autostraße | road motorway |