Respondence is a relatively uncommon word that means communication or response. Synonyms for respondence include correspondence, interaction, communication, feedback, and reply. Correspondence implies a written or typed exchange, such as email or letters. Interaction and communication refer to the act of speaking or discussing, while feedback and reply indicate a response to a question or request. Other synonyms for respondence include answer, reaction, and acknowledgement, which all denote some form of response to a message or situation. These words can be used interchangeably depending on the context in which they are used.