compassionless vs cutthroat

compassionless

adj
  • Without compassion; hardhearted. 

cutthroat

adj
  • Involving the cutting of throats. 

  • Ruthlessly competitive, dog-eat-dog. 

  • Of or relating to a card game where everyone plays for him or herself rather than playing with a partner. 

noun
  • An unscrupulous, ruthless or unethical person. 

  • A three-player pocket billiards game where the object is to be the last player with at least one ball still on the table. 

  • A murderer who slits the throats of victims. 

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