scar vs stain

scar

verb
  • To form a scar. 

  • To mark the skin permanently. 

  • To affect deeply in a traumatic manner. 

noun
  • A rock in the sea breaking out from the surface of the water. 

  • A permanent mark on the skin, sometimes caused by the healing of a wound. 

  • A cliff or rock outcrop. 

  • A bare rocky place on the side of a hill or mountain. 

  • A permanent negative effect on someone's mind, caused by a traumatic experience. 

  • Any permanent mark resulting from damage. 

  • A marine food fish, the scarus or parrotfish (family Scaridae). 

stain

verb
  • To become stained; to take a stain. 

  • To cause to seem inferior or soiled by comparison. 

  • To coat a surface with a stain 

  • To treat (a microscopic specimen) with a dye, especially one that dyes specific features 

  • To taint or tarnish someone's character or reputation 

  • To discolour. 

noun
  • A reagent or dye used to stain microscope specimens so as to make some structures visible. 

  • A discoloured spot or area. 

  • Any of a number of non-standard tinctures used in modern heraldry. 

  • A blemish on one's character or reputation. 

  • A substance used to soak into a surface and colour it. 

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