Plaster is a common construction and repair material that is typically used to cover and protect walls and ceilings. However, sometimes you may want to use different words to describe this versatile material. Some synonyms for plaster include stucco, cement, mortar, putty, and spackle. Stucco is a kind of plaster that has a coarser texture and is more durable. Cement is another name for a type of plaster that is used specifically on concrete walls. Mortar is a type of plaster that is commonly used in brick or masonry construction. Putty is a type of plaster used to fill holes or cracks in walls or ceilings, while spackle is a smaller, quick-drying type of putty.