The acronym WRB, which stands for Weather-Resistant Barrier, refers to the material used to protect buildings from the elements. There are many synonyms for WRB, including air barrier, vapor barrier, and water barrier. Each type of barrier serves a unique purpose in protecting a building from moisture and energy loss. Other synonyms for WRB include housewrap, building paper, and felt paper. These materials are often made from synthetic materials or natural materials like wood and tar paper. Overall, the use of WRB materials is essential in ensuring the longevity and durability of a building, protecting it against the elements and natural wear and tear.