| Aquaristik | fishkeeping |
| Aquaristin | aquarist |
| Aquarist | aquarist |
| Squadristin | blackshirt |
| Heuristik | heuristics |
| Arabistik | Arab study |
| Aquadest | distilled water |
| Aquaponik | aquaponics |
| aquatisch | aquatic |
| Äquativ | equative |
| Aqualith | aqualite |
| Aquarellistin | watercolourist aquarellist watercolorist |
| Aquarianer | aquarist |
| Aquarium | aquarium tank |
| Aquatinta | aquatint |
| Aquavit | aquavit |
| Quartil | quartile |
| Squadrist | blackshirt |
| Säkularistin | secularist |
| Futuristik | futurology |