The term 'POURABLE ART MATERIAL' can be summarized as a type of RESIN, which is a five-letter word. RESIN is a natural or synthetic material that is used in many different applications, such as adhesives, coatings, and sealants. It is also used in the production of art materials, including paints, varnishes, and glazes. RESIN is known for its durability and flexibility, making it an ideal material for creating artworks.