| Quadratschädel | square head block |
| Quadratestadt | City of Squares |
| Quadratsekunde | second |
| Quadratwurzel | square root |
| Quadratzahl | square number |
| quadratisch | quadratic square |
| Quadratmeile | square mile |
| Quadratmeter | square meter square metre |
| quatschen | blether have a chat gab |
| quietschfidel | jolly |
| Hirnschädel | cranium |
| Ultraschall | ultrasound |
| Quadratfuß | square foot |
| Quadrilliarde | octillion |
| Quadrocopter | quadcopter |
| Quadrupede | quadruped |
| Quadrupeder | quadruped |
| Quarkkuchen | cheesecake |
| Quatsch reden | drool |
| Quatschtüte | tattletale |