| Autorepeat | autorepeat |
| Autorität | authority |
| autokephal | autocephalous autocephalic |
| autozephal | autocephalous autocephalic |
| autorisiert | authorized |
| Autokrat | autocrat |
| Automat | vending machine |
| Autoreifen | tire tyre |
| Autorennen | motor race |
| Autoreverse | autoreverse |
| Autorschaft | authorship |
| autoritär | authoritarian |
| Autograph | autograph |
| autosexuell | autosexual |
| Autarkie | autarky self-sufficiency |
| Autoabgas | car exhaust |
| Autoatlas | road atlas |
| Autocar | bus |
| Autodidakt | autodidact |
| Autodieb | car thief |