A support arch is a structure that assists in bearing the weight of a building, bridge, or any other heavy construction. Synonyms for support arch include buttress, bracket, prop, pillar, beam, truss, stay, foundation, base, and footing. Buttresses and brackets are often attached to walls to provide lateral support. Pillars and columns are vertical support structures used to bear the weight of a building. Beams and trusses distribute weight evenly, while stays add stability to a structure. A strong foundation with a stable base is vital for any structure. Footings provide the underground support needed to keep a building from sinking or shifting.