| Quartär | Quaternary |
| Quartal | quarter |
| Quart | quart |
| Quartil | quartile |
| Quantor | quantifier |
| Quartier | accommodation quarter |
| Quasar | quasar |
| Quästor | quaestor |
| Quargel | Olomouc cheese |
| Quarzit | quartzite |
| Quader | cuboid rectangular cuboid rectangular parallelepiped |
| Quadrat | square |
| Quadratur | quadrature |
| Quagga | quagga |
| Qualität | quality |
| Quant | quantum |
| Quanten | big trotters boats clodhoppers |
| Quantil | quantile |
| Quantum | quantum |
| Quark | cottage cheese quark fromage frais |