The term "mercy seat" is a biblical reference used to describe the cover of the Ark of the Covenant. In modern language, there are several synonyms that can be used to describe this symbol of divine grace and mercy. Some examples include "throne of grace," "seat of mercy," "altar of forgiveness," and "shrine of redemption." These synonyms emphasize the idea of a place where forgiveness can be found and where one can approach God seeking mercy and grace. The "mercy seat" or whatever synonym may be used, serves as a reminder of God's love, compassion, and mercy towards His people.