castoff vs gainsaying

castoff

noun
  • Something that has been rejected or discarded; a reject. 

adj
  • discarded, rejected. 

gainsaying

noun
  • Refusal to accept or believe something. 

  • Denial; denying. 

  • Rebellious opposition; rebellion. 

  • Contradiction. 

  • Opposition, especially in speech. 

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