Audible (adjective)
Able to be heard.
Audible (verb)
To change the play at the line of scrimmage by yelling out a new one.
“The quarterback audibled after seeing the defensive formation.”
Audible (noun)
The act of or an instance of changing the play at the line of scrimmage by yelling out a new one.
“The audible changed the play to a run.”
Hearable (adjective)
That can be heard; audible
Wiktionary