convertible vs synonymous

convertible

adj
  • Able to be turned to a different purpose. 

  • Able to be exchanged for foreign currency. 

  • Able to be exchanged for a different class of security (usually common stock) under certain set terms. 

  • Able to be exchanged, one for the other, especially 

  • Able to be turned to a different religion or belief. 

  • Able to undergo conversion (i.e., inversion) without falsehood. 

  • Able to change from a closed to an open frame and back again. 

  • Able to be exchanged for specie. 

noun
  • A convertible security: a stock, bond, etc. that can be turned into another (usually common stock) under certain set terms. 

  • A convertible car: a car with a removable or foldable roof able to convert from a closed to open vehicle and back again. 

  • A computer able to convert from laptop to tablet and back again. 

synonymous

adj
  • Having a similar meaning. 

  • Having an identical meaning. 

  • Such that both its forms yield the same sequenced protein. 

  • Of, or being a synonym. 

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