Utterer
Part of speech: noun
Definition: One (especially a man) who utters (something)
Speaker
Part of speech: noun
Definition: One who speaks.Loudspeaker.The chair or presiding officer of certain legislative bodies, such as the U.K. House of Commons or the U.S. House of Representatives.One who makes a speech to an audience.The producer of a given utterance, whether actually spoken or not.
Example sentence: To suppress free speech is a double wrong. It violates the rights of the hearer as well as those of the speaker.