atter vs venin

atter

noun
  • Poison, venom, especially of a venomous animal. 

  • Pus, corrupt or morbid matter from a sore or wound. 

  • A scab; a dry sore. 

  • Epithelium produced on the tongue. 

verb
  • To venom; sting. 

  • To discharge, as a sore; clot; curdle; cake. 

venin

noun
  • A toxic substance found in the venom of poisonous snakes. 

  • A supposedly identical toxic substance obtained by cleavage of an albumose. 

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