| Quadrat- | square |
| Quadrat | square |
| Quadrant | quadrant |
| Quadratum | quadrate bone |
| Quadratur | quadrature |
| Quart | quart |
| Quadriga | quadriga |
| Aquadest | distilled water |
| Quadratfuß | square foot |
| Quargel | Olomouc cheese |
| Quartil | quartile |
| Quarzit | quartzite |
| Squadrist | blackshirt |
| Aquädukt | aqueduct |
| Quad | quad quad bike |
| Quaddel | welt |
| Quade | Quadi |
| Quader | cuboid rectangular cuboid rectangular parallelepiped |
| Quadratzahl | square number |
| Quadrille | quadrille |