| Aquädukt | aqueduct |
| Aquadest | distilled water |
| Aquarist | aquarist |
| Aquavit | aquavit |
| Quadrat | square |
| Viadukt | viaduct |
| Aqualunge | aqualung |
| Aquapark | aquapark |
| Äquativ | equative |
| Aquakultur | aquaculture |
| Aqualith | aqualite |
| Aquarell | watercolour watercolor |
| Aquarium | aquarium tank |
| Aquatinta | aquatint |
| adäquat | adequate appropriate |
| Äquator | equator |
| äquivok | equivocal |
| Quart | quart |
| Quarzit | quartzite |
| Squadrist | blackshirt |