interrelationship vs reaction

interrelationship

noun
  • A relationship between multiple things. 

adj
  • Between multiple relationships; interrelation 

reaction

noun
  • An action or statement in response to a stimulus or other event. 

  • A transformation in which one or more substances is converted into another by combination or decomposition. 

  • An icon or emoji appended to a posted message by a user to express their feeling about it. 

  • Reactionary politics; a period in which reactionary thought or politics is resurgent or dominant. 

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