The word "swapper" generally means someone who exchanges goods or services. However, there are multiple synonyms for the word that allow for a variation in language use. For example, "exchanger" can be used to refer to someone who swaps or trades items. Another synonym is "barterer," which suggests an exchange of goods or services for other items of similar value. "Trader" and "negotiator" are also viable synonyms, particularly when referring to someone who is skilled at exchanging services or products in a marketplace setting. Finally, "mover" is a synonym that works well for individuals who frequently swap or shift items in their daily routines.