| Äquinoktium | equinox |
| Äquilibrium | equilibrium |
| Ununoctium | ununoctium |
| Artinskium | Artinskian |
| Aquarium | aquarium tank |
| äquivok | equivocal |
| Quintin | Quentin |
| Quintinus | Quentin Quinten Quinton |
| Unbioctium | unbioctium |
| Unniloctium | unniloctium |
| Abditorium | abditory |
| Actinium | actinium |
| Aluminium | aluminium aluminum |
| Auditorium | auditory auditorium |
| Aquaponik | aquaponics |
| Aquaristin | aquarist |
| Äquativ | equative |
| Äquatorial | equatorial |
| äquatorial | equatorial |
| Aquakultur | aquaculture |