Flat joints refer to a condition where two surfaces meet in a flat manner, usually in construction or woodworking projects. However, several other terms can be used synonymously with flat joints, such as butt joints, flush joints, or even jointed edges. These terms describe similar conditions where flat surfaces meet, but they may vary in their application. Butt joints are typically perpendicular joints where the edges meet squarely, and flush joints describe surfaces that align evenly with each other. Jointed edges refer to the edges of two flat pieces of wood that have been cut or shaped to meet precisely. Overall, these synonyms for flat joints provide greater specificity and clarity in describing complex woodworking or construction projects.