| Autorhythmie | autorhythmicity |
| Arrhythmie | arrhythmia |
| Autotomie | autotomy |
| Autobatterie | car battery |
| Autochthoner | autochthon |
| Autoerotik | autoerotism |
| Autogamie | autogamy |
| Autographie | autography |
| Autohypnose | autohypnosis |
| Autokratie | autocracy |
| Autonomie | autonomy |
| Autophagie | autophagocytosis |
| Autophilie | autophilia self-love |
| Autotherapie | autotherapy |
| Autotrophie | autotrophy |
| Autotypie | autotypy |
| autochthon | autochthonous |
| autoritativ | authoritative |
| Forsythie | forsythia border forsythia |
| Antonymie | antonymy |