Graininess is a term used to describe the texture of an image or substance that appears to have small, coarse particles. When searching for synonyms for this word, options include coarseness, roughness, granularity, grittiness, texture, and particulate nature. These words can be used to describe the surface of materials such as sandpaper, concrete, or even foods like popcorn or cornmeal. In photography, graininess can be applied to images that are overexposed or low in detail. Synonyms for graininess broaden the vocabulary used in describing the texture of surfaces and improve understanding of how certain materials or images feel and appear.