Sentence:  Many houses built between the Civil War and 1940 have <WSD>masonry</WSD> walls, usually of brick, with the inside surfaces covered by a layer of plaster. 
Meaning of the word marked with <WSD> tags:  That which is built by a mason; anything constructed of the materials used by masons, such as stone, brick, tiles, or the like. Dry masonry is applied to structures made without mortar.