A wearing course is a layer of material that is applied to a road or pavement to improve its durability and resistance to wear and tear. Some synonyms for this term include the surface course, top layer, overlay, and final coat. The wearing course is typically made of a strong and durable material such as asphalt or concrete and is applied on top of a base layer to provide a smooth surface for vehicles to travel on. Other terms that can be used to refer to this type of layer include the finish coat, top coat, and wearing surface. Regardless of what it's called, the wearing course is an essential component of any road or pavement structure, helping to ensure its longevity and safety.