abrasion

noun

1 diamond's extreme resistance to abrasion:

wearing away/down, wearing, erosion, scraping, corrosion, being eaten away, chafing, rubbing, stripping, flaying, excoriation.

2 he had abrasions to his forehead:

graze, scrape, scratch, cut, gash, laceration, tear, rent, slash, injury, contusion;

sore, ulcer;

Medicine trauma, traumatism.

abrasion Oxford Dictionary of English