aromatic vs odorant

aromatic

noun
  • Any aromatic compound. 

  • A fragrant plant or spice added to a dish to flavour it. 

adj
  • Fragrant or spicy. 

  • Having a closed ring of alternate single and double bonds with delocalized electrons. 

  • Derived from benzene. 

odorant

noun
  • Any substance that has a distinctive smell, especially one added to something (such as household gas) for safety purposes 

adj
  • Having an odour/odor. 

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