rationalization vs warrant

rationalization

noun
  • A statement of one's motives, or of the causes of some event. 

  • The concealment of true motivation in some non-threatening way. 

  • The process or result of rationalizing. 

  • The simplification of an expression without changing its value. 

  • A reorganization of a company or organization in order to improve its efficiency. 

warrant

noun
  • Something that provides assurance or confirmation; a guarantee or proof. 

  • Authorization or certification; a sanction, as given by a superior. 

  • A certificate of appointment given to a warrant officer. 

  • A judicial writ authorizing an officer to make a search, seizure, or arrest, or to execute a judgment. 

  • An option, usually issued together with another security and with a term at issue greater than a year, to buy other securities of the issuer. 

  • Underclay in a coal mine. 

  • A document certifying that a motor vehicle meets certain standards of mechanical soundness and safety; a warrant of fitness. 

  • An order that serves as authorization; especially a voucher authorizing payment or receipt of money. 

verb
  • To justify; to give grounds for. 

  • To authorize; to give (someone) sanction or warrant (to do something). 

  • To guarantee (something) to be (of a specified quality, value, etc.). 

  • To guarantee as being true; (colloquial) to believe strongly. 

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