Interposer is a word that usually refers to an intermediate device or layer that is used for connection or alteration purposes. While this term is specific and significant in many technical fields, there are various other words that can be used to convey the same meaning. Some of the synonyms for interposer include mediator, intermediate, link, connector, intermediary, bridge, go-between, and interface. These words all describe a substance or technology that acts as a bridge or connector between the two sides, linking them and facilitating their communication. Precise use of these synonyms in a given context can make one's language more enriched and expressive.