inauthentic vs synthetic

inauthentic

adj
  • Not authentic or genuine; spurious. 

synthetic

adj
  • Artificial, not genuine. 

  • Of, or relating to synthesis. 

  • Produced by synthesis instead of being isolated from a natural source (but may be identical to a product so obtained). 

  • Produced by synthesis, thought to have the same effect as its natural counterpart, but chemically different from it. 

  • Pertaining to the joining of bound morphemes in a word (compare analytic). 

  • Of a language, having a grammar principally dependent on the use of bound morphemes to indicate syntactic relationships (compare analytic). 

noun
  • A synthetic compound. 

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