General:
* Human: This is the most straightforward term, as all humans have the capacity to hear and speak.
* Communicator: This emphasizes the ability to both receive and transmit information.
* Conversationalist: This implies someone who enjoys and is skilled at speaking.
More specific:
* Linguistic: This describes someone who uses language.
* Auditory: This emphasizes the ability to hear.
* Vocal: This emphasizes the ability to speak.
Descriptive:
* Eloquent: This describes someone who speaks fluently and effectively.
* Articulate: This describes someone who speaks clearly and distinctly.
* Attentive: This describes someone who listens carefully.
Ultimately, the best word to use depends on the specific situation and the emphasis you want to convey.