perversion vs surety

perversion

noun
  • The action of perverting someone or something; humiliation; debasement. 

  • The state of being perverted; depravity; vice. 

  • Distortion or corruption of the original course, meaning, or state of something. 

  • A sexual practice considered abnormal; sexual deviance. 

  • Tendril perversion. 

surety

noun
  • A promise to pay a sum of money in the event that another person fails to fulfill an obligation. 

  • One who undertakes to pay money or perform other acts in the event that his principal fails therein. 

  • A substitute; a hostage. 

  • Evidence; confirmation; warrant. 

  • Certainty. 

  • That which makes sure; that which confirms; ground of confidence or security. 

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