| Quarantäne | quarantine |
| Quadrant | quadrant |
| Quanten | big trotters boats clodhoppers |
| Quartal | quarter |
| Quartär | Quaternary |
| Guarana | guarana |
| Garantie | guarantee |
| Karawane | caravan |
| Kläranlage | sewage treatment plant wastewater treatment plant |
| Parataxe | parataxis |
| Aquaristin | aquarist |
| Quart | quart |
| Quartil | quartile |
| Quarzit | quartzite |
| Aquarianer | aquarist |
| Aquatinta | aquatint |
| Quadrat- | square |
| Quadrat | square |
| Quadratum | quadrate bone |
| Quadratur | quadrature |