ambiguity vs delusion

ambiguity

noun
  • The state of being ambiguous. 

  • words or statements that are open to more than one interpretation, explanation or meaning, especially if that meaning cannot be determined from its context. 

delusion

noun
  • The state of being deluded or misled, or process of deluding somebody. 

  • A false belief that is resistant to confrontation with actual facts. 

  • A fixed, false belief, that will not change, despite evidence to the contrary. 

  • That which is falsely or delusively believed or propagated; false belief; error in belief. 

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