Grainer is a term used to describe a person who operates a machine that adds texture or patterns to surfaces. However, there are several synonyms that can be used to describe a Grainer. Some of the commonly used synonyms include "Texturer," "Embosser," "Engraver," "Imprinter," and "Pattern Maker." These synonyms reflect the different processes that are involved in creating textures or patterns on surfaces. The choice of synonym to describe a Grainer depends on the specific techniques used by the person. Nonetheless, all these synonyms refer to skilled professionals who are essential in the art of surface decoration.