grinding Synonyms

grating trying milling scraping laborious crushing detrition difficult severe backbreaking rasping hard abrasive abrasion attrition arduous burdensome onerous serious pyrotic sticky squeak smoothing slicking shafting sharpening punishing shredding sharpen scrubbing sanding rolling rough rubbing rugged shredder rasp sandpaper sawing scouring scrape scratching screeching relentless stridor strop whet unceasing abrader friction