killing vs lethal

killing

adj
  • That literally deprives of life; lethal, deadly, fatal. 

  • That makes one ‘die’ with laughter; very funny. 

noun
  • A large amount of money. 

  • An instance of someone being killed. 

lethal

adj
  • Of, pertaining to, or causing death; deadly; mortal; fatal. 

noun
  • One of the higher alcohols of the paraffine series obtained from spermaceti as a white crystalline solid. 

  • An allele that causes the death of the organism that carries it. 

  • Any weapon that causes death. 

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