cinereous vs hoar

cinereous

adj

  • Of an ash-gray colour. 

  • Containing ashes. 

  • Like ashes. 

hoar

adj

  • Of a white or greyish-white colour. 

  • Hoarily bearded. 

noun

  • A white or greyish-white colour. 

  • Hoariness; antiquity. 

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