* Audacious: Bold, daring, and fearless.
* Audacity: The quality of being audacious.
* Audible: Able to be heard.
* Audience: A group of people gathered to watch or listen to a performance or event.
* Audio: Relating to sound.
* Audiologist: A healthcare professional who specializes in the diagnosis and treatment of hearing and balance disorders.
* Auditor: A person who examines and verifies financial accounts.
* Audit: A formal examination of financial accounts.
* Auditory: Relating to the sense of hearing.
* Audition: A trial performance to assess someone's suitability for a role.
Let me know if you would like more examples!