| autoritativ | authoritative |
| Autorität | authority |
| Autorisation | authorisation authorization |
| autoritär | authoritarian |
| Autoerotik | autoerotism |
| Autokratie | autocracy |
| Automatik | automatism automatic automatic transmission |
| Autoradio | car radio automobile radio |
| Autoxidation | autoxidation |
| Notorität | notoriety |
| charitativ | caritative |
| Alterität | alterity |
| Austerität | austerity |
| karitativ | charitable caritative |
| nutritiv | nutritive nutritious |
| Komitativ | comitative case |
| qualitativ | qualitative |
| quantitativ | quantitative |
| Augmentativ | augmentative |
| alternativ | alternative |