caustic vs toxicant

caustic

noun
  • Any substance or means which, applied to animal or other organic tissue, burns, corrodes, or destroys it by chemical action; an escharotic. 

  • The envelope of reflected or refracted rays for a given curve. 

  • Caustic soda. 

  • The envelope of reflected or refracted rays of light for a given surface or object. 

adj
  • Capable of burning, corroding or destroying organic tissue. 

  • Sharp, bitter, cutting, biting, and sarcastic in a scathing way. 

toxicant

noun
  • A toxic or poisonous substance. 

adj
  • Capable of causing damage or dysfunction by toxicity; (broadly) poisonous. 

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