Rough-grained refers to a surface or texture that is uneven, abrasive, and hard to the touch. There are several synonyms that can be used to describe a surface with a rough-grained texture, such as coarse, grainy, gritty, abrasive, rugged, sandy, and uneven. These words convey the roughness and coarseness of the surface, and they are useful when describing materials such as wood, stones, or fabrics. The use of synonyms helps to create more vivid and descriptive language, as well as to avoid repetition and monotony in writing. By choosing the right synonym, you can add depth and complexity to your descriptions.