Cohesive substances are materials that have the ability to stick together. Some common synonyms for cohesive substances include adhesive, stickum, gluey, gum-like, and tenacious. Adhesive is a general term that refers to any substance that can bond two surface materials together. Stickum is a sticky substance often used in the manufacturing of tapes. Gum-like refers to any material that has a soft, sticky consistency similar to gum. Tenacious is another synonym that describes a material's ability to hold fast and remain sticky. All of these synonyms for cohesive substances share the common trait of being able to bind materials together in order to create a strong bond.