blur vs excrescence

blur

noun
  • A smear, smudge or blot 

  • Something that appears hazy or indistinct 

verb
  • To cause imperfection of vision in; to dim; to darken. 

  • To become indistinct. 

  • To transfer the input focus away from. 

  • To smear, stain or smudge. 

  • To make indistinct or hazy, to obscure or dim. 

adj
  • In a state of doubt or confusion. 

excrescence

noun
  • A disfiguring or unwanted mark or adjunct. 

  • The epenthesis of a consonant, e.g., warmth as [ˈwɔrmpθ] (adding a [p] between [m] and [θ]), or -t (Etymology 2). 

  • Something, usually abnormal, which grows out of something else. 

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