falsity vs rumor

falsity

noun
  • Something that is false; an untrue assertion. 

  • The falsity of that statement is easily proven. 

  • The characteristic of being untrue. 

rumor

noun
  • Information or misinformation of the kind contained in such claims. 

  • A statement or claim of questionable accuracy, from no known reliable source, usually spread by word of mouth. 

verb
  • To tell a rumor about; to gossip. 

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