ideation vs rationalization

ideation

noun
  • The synthesis of ideas. 

  • The conceptualization of a mental image. 

rationalization

noun
  • The process or result of rationalizing. 

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

  • The simplification of an expression without changing its value. 

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

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

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