| Autonomie | autonomy |
| Autotomie | autotomy |
| Autobombe | car bomb |
| Autogamie | autogamy |
| Autonomist | autonomist |
| autonom | autonomous self-governed |
| Antonymie | antonymy |
| Agronomie | agronomy |
| Astronomie | astronomy |
| Antinomie | antinomy |
| Autoerotik | autoerotism |
| Automobil | automobile car auto motorcar |
| automobil | automotive |
| Autonummer | license plate number |
| Autopsie | autopsy |
| Autoskopie | autolaryngoscopy autoscopy |
| Autosom | autosome |
| Autotoxin | autotoxin |
| Autotypie | autotypy |
| Tautologie | tautology |