| Squadrist | blackshirt |
| Squadristin | blackshirt |
| Aquarist | aquarist |
| Aquadest | distilled water |
| Quadrant | quadrant |
| Quadrat | square |
| Quadriga | quadriga |
| Sadist | sadist |
| Squash | squash |
| Squat | squat |
| Aquaristin | aquarist |
| Quart | quart |
| Quarzit | quartzite |
| Aquaristik | fishkeeping |
| Aquarium | aquarium tank |
| Aquavit | aquavit |
| Aquädukt | aqueduct |
| Quadrat- | square |
| Quadrille | quadrille |
| Quälgeist | gadfly torment |