Directly related:
* Audible: Capable of being heard
* Audience: A group of people listening to something
* Audio: Relating to sound
* Auditorium: A large room for public gatherings, especially for performances or lectures
Less directly related, but still connected to the concept of hearing:
* Auditory: Relating to the sense of hearing
* Audiologist: A specialist in the diagnosis and treatment of hearing disorders
* Audition: A trial performance to assess someone's suitability for a role
* Audiophile: A person who is enthusiastic about high-fidelity sound reproduction
* Audacious: Bold or daring, perhaps suggesting a willingness to listen to one's own instincts
* Auditive: Relating to hearing or the sense of hearing
Note: While "audit" and "auditor" share a similar sound, they derive from a different Latin root ("audire" meaning "to hear, to listen").