Gluer is a word used to describe someone who applies glue to an object or surface. However, there are many synonyms that can be used to describe this action. One common synonym for gluer is adhesives applicator. Another option is to use the term sticky substance applier or cementer. Other synonyms include binder, adherer, and attachist. Additionally, glue spreader, fixer, and tackifier are all viable options. Ultimately, there are numerous words that can be used in place of gluer, depending on the context and desired tone of the sentence.