There are various synonyms that can be used instead of the term "sheet cake." One such synonym is "slab cake," which refers to a large, flat cake that is typically baked in a rectangular or square shape and is often cut into smaller pieces. Another term that can be used is "party cake," as sheet cakes are commonly used to serve large groups of people at events or gatherings. Some bakers also refer to these cakes as "tray bakes," as they are often baked on a large tray and can be cut into individual portions. No matter the term used, sheet cakes are a delicious and versatile dessert that is sure to satisfy any sweet tooth.