| Quadrillion | septillion |
| quadrillionste | septillionth |
| Quadrille | quadrille |
| Quintillion | quintillion nonillion |
| Quadrieren | quadrature |
| quadrieren | square |
| Quadrilliarde | octillion |
| Squadristin | blackshirt |
| Quadrivium | quadrivium |
| Carillon | carillon |
| Trillion | quintillion |
| Duodezillion | duodecillion |
| Quindezillion | novemvigintillion |
| Quinquillion | nonillion |
| Undezillion | undecillion |
| Aquaristin | aquarist |
| Quadriplegie | quadriplegia |
| Quaternion | quaternion |
| Aquarellist | watercolourist aquarellist watercolorist |
| Quaderstein | ashlar square stone |