ballsy vs lifeless

ballsy

adj
  • Tough and courageous; having balls. 

lifeless

adj
  • inanimate; having no life 

  • dull or lacking vitality 

  • dead; having lost life 

  • uninhabited, or incapable of supporting life 

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