Pebbledash is a type of exterior finish for walls that involves covering them with small rocks or pebbles. It is a popular choice for homes and buildings that require a durable, textured surface that can withstand harsh weather conditions. Some synonyms for pebbledash include roughcast, stucco, plaster, and render. Roughcast is a technique where the pebbles are mixed in with the wet plaster before it dries, giving it a rugged texture. Stucco is a similar technique that involves applying a mixture of sand, cement, and water to the wall surface. Plaster and render are both techniques that involve applying a smooth finish over a base layer of pebbledash.