Coarse-grainedness describes something that's rough or lacking in detail. Some synonyms for this word include roughness, granularity, chunkiness, texture, and graininess. These words all describe a similar lack of refinement or clarity, suggesting that the thing being described is somewhat primitive or unsophisticated. Other related terms might include ruggedness or coarseness, which imply a lack of polish or finesse. If you're looking for words that suggest a more refined or detailed quality, you might try using terms like fineness, precision, subtlety, or intricacy instead. However, for situations where a rough or unrefined quality is appropriate, coarse-grainedness may be the perfect choice of words.