| Autoblock | autoblock |
| Autobrücke | road bridge |
| Autowrack | car wreck |
| Macroblock | macroblock |
| Motorblock | engine block |
| Ostblock | Eastern Bloc |
| Autobahn | motorway freeway highway interstate highway |
| Autobombe | car bomb |
| Autobus | bus coach motorbus |
| Autocross | autocross |
| Autocue | autocue |
| Autodrom | motor-racing circuit dodgems track bumper car dodgem |
| Autoerotik | autoerotism |
| Autoklav | autoclave |
| Autolyse | autolysis |
| Automatik | automatism automatic automatic transmission |
| Autopilot | autopilot automatic pilot |
| Autosom | autosome |
| Autostopp | hitch-hiking autostop |
| Autozoom | autozoom |