suppositious vs truthful

suppositious

adj
  • Imaginary; fictitious, pretended to exist. 

  • Hypothetical, based on supposition; suppositional. 

  • Spurious; substituted for the genuine, counterfeit; fake; supposititious. 

truthful

adj
  • Honest, and always telling the truth. 

  • Accurately depicting what is real. 

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