| Aquaponik | aquaponics |
| Aquapark | aquapark |
| Aquaphobie | aquaphobia |
| Aqualunge | aqualung |
| Äquativ | equative |
| Äquatorial | equatorial |
| äquatorial | equatorial |
| Aquamarin | aquamarine |
| aquamarin | aquamarine |
| Aquaplaning | aquaplaning hydroplaning wet skidding |
| Aquaristik | fishkeeping |
| Aquatinta | aquatint |
| Aquavit | aquavit |
| Äquator | equator |
| äquivok | equivocal |
| Amazonit | amazonite |
| Aragonit | aragonite |
| Avionik | avionics |
| Aquadest | distilled water |
| Aquarist | aquarist |