| Quadrat | square |
| Quadrat- | square |
| Quadratum | quadrate bone |
| Quadratur | quadrature |
| Quadratfuß | square foot |
| Quadrant | quadrant |
| Quadratzahl | square number |
| quadratisch | quadratic square |
| Quart | quart |
| Quadratmeile | square mile |
| Quadratmeter | square meter square metre |
| Aquadest | distilled water |
| Quarzit | quartzite |
| Squadrist | blackshirt |
| Aquädukt | aqueduct |
| Quad | quad quad bike |
| Quaddel | welt |
| Quade | Quadi |
| Quader | cuboid rectangular cuboid rectangular parallelepiped |
| Quadratestadt | City of Squares |