Common Words:
* Aquarium: A tank for keeping fish and other aquatic animals.
* Aquatic: Relating to water or living in water.
* Aqueduct: A channel for carrying water, often built by ancient civilizations.
* Aquamarine: A bluish-green gemstone.
* Aquaponics: A system of growing plants in water with fish.
* Aquaculture: The farming of aquatic organisms such as fish, shellfish, and seaweed.
Less Common Words:
* Aquiferous: Containing or conveying water.
* Aqueous: Relating to or composed of water.
* Aqua vitae: Latin for "water of life," often used to refer to strong alcoholic beverages.
* Subaqueous: Under water.
Related Words:
* Marine: Relating to the sea.
* Oceanic: Relating to the ocean.
* Hydrate: To combine with water.
* Hydroponics: A method of growing plants in water without soil.
This is not an exhaustive list, but it gives you a good starting point. The root "aqua" appears in many scientific and technical terms as well, so you may find it helpful to look up words related to your specific area of interest.