abrasion vs contusion

abrasion

noun
  • The act of abrading, wearing, or rubbing off; the wearing away by friction. 

  • A superficial wound caused by scraping; an area of skin where the cells on the surface have been scraped or worn away. 

  • The effect of mechanical erosion of rock, especially a river bed, by rock fragments scratching and scraping it. 

  • An abraded, scraped, or worn area. 

  • The wearing away of the surface of the tooth by chewing. 

contusion

noun
  • Synonym of bruising. 

  • Synonym of bruise. 

How often have the words abrasion and contusion occurred in a corpus of books? (source: Google Ngram Viewer )