* Aviation: The art or science of flight.
* Aviary: A place where birds are kept.
* Avian: Relating to birds.
* Aviator: A pilot.
* Aviculture: The practice of breeding birds.
* Aviatrix: A female pilot.
* Avid: Having a strong interest in something. (Note: This word is unrelated to the "avi" root, but it sounds similar)
It's important to note that "avi" is often used in combination with other roots to create more specific words. For example, "avi-fauna" refers specifically to the bird life in a particular region.