encumbrance vs synergy

encumbrance

noun
  • An interest, right, burden, or liability attached to a title of land, such as a lien or mortgage. 

  • Something that encumbers; a burden that must be carried. 

  • One who is dependent on another. 

verb
  • To apply an encumbrance to (property, etc.). 

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 encumbrance and synergy occurred in a corpus of books? (source: Google Ngram Viewer )