| Antivirus | antivirus |
| antiviral | antiviral |
| Antonius | Antonius |
| Aktivismus | activism |
| Aidsvirus | Aids virus HIV |
| Antazidum | antacid |
| Antimer | antimere |
| Antiochos | Antiochus |
| Antiphrase | antiphrasis |
| Antares | Antares |
| Antibiont | antibiont |
| Antibiose | antibiosis |
| Antichrese | antichresis |
| Antichrist | Antichrist antichristian |
| Antiqua | old face type roman type |
| Aktivieren | activation |
| aktivieren | activate |
| Aktivierung | activation |
| Aktivist | activist |
| Aktivität | activity |