The term "stickums" refers to any kind of adhesive substance used to stick things together. Some synonyms for "stickums" include glue, adhesive, tape, sticky, gum, bonding agent, and sticker backings. Each of these has slightly different applications, such as tape being used for temporary sticking, while glue and adhesive are more permanent. Sticky can be used to describe any surface that adheres to objects easily, while gum and bonding agent suggest a stronger hold. Sticker backings is a term commonly used to describe the material used to attach stickers to objects. Ultimately, the choice of terminology depends on the context and the specific type and strength of adhesive being used.