The word "addresser" is a seldom-used term that refers to someone who is sending a message or communication to another person. There are many synonyms for this word, including sender, writer, communicator, correspondent, author, or even speaker. Each of these words embodies the act of transmitting information in some way, whether it's through written or spoken words. These synonyms may be used interchangeably depending on the context of the message, but they all carry the same basic meaning - that of someone initiating a communication and reaching out to another person with information, ideas, or thoughts.