Bridgeworks are generally known as structures that allow people to cross over waterways or roads. There are many synonyms for the word bridgeworks, some of which are bridge, viaduct, overpass, flyover, causeway, aqueduct, and footbridge. Each word portrays a different meaning, such as bridge and viaduct are mostly interchangeable, where viaducts are used for elevated sections of a longer bridge. Overpass and flyover are used in reference to elevated roads that cross over lower roads. Causeways are made up of several small bridges on water and aquatic environments. Aqueducts are water channels that often span valleys. Footbridges are small bridges for pedestrians. The use of these synonyms may vary significantly depending on the region, setting, and geography.