brutal vs viperish

brutal

adj
  • Harsh; unrelenting. 

  • Disagreeably precise or penetrating. 

  • Savagely violent, vicious, ruthless, or cruel. 

  • Crude or unfeeling in manner or speech. 

  • Direct and without attempt to disguise unpleasantness. 

  • In extreme metal, to describe the speed of the music and the density of riffs. 

viperish

adj
  • spiteful; treacherous 

  • In the manner of a viper. 

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