blockage vs synergy

blockage

noun
  • Synonym of constipation (“impairment of feces passage”). 

  • The thing that is the cause of such a state, blocking a passage. 

  • The state or condition of being blocked. 

  • Synonym of thrombosis, synonym of thromboembolism, or synonym of embolism. 

synergy

noun
  • Benefits resulting from combining different groups, people, objects or processes. 

  • The cooperation of two or more nerves, muscles, organs, etc. 

  • A synonym of binding energy. 

  • The combined action of two or more drugs where the effects are stronger than their mere sum. 

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