"Affirmer" is a word that refers to someone who asserts or confirms something with confidence and conviction. It is often used in situations where a person wants to express their belief or opinion on a particular matter. However, there are various synonyms for "affirmer" that can be used interchangeably. Some common synonyms for "affirmer" are "assertor," "avower," "declarer," "proclaimer," "stater," and "voucher." Each of these synonyms carries a unique connotation that can be used depending on the context. For instance, "avower" emphasizes the declaration of truth, while "proclaimer" emphasizes the assertion of a message or idea. Using these synonyms can add variety and depth to one's speech or writing.