boost vs defeat

boost

verb
  • To help or encourage (something) to increase or improve; to assist in overcoming obstacles. 

  • To lift or push from behind (one who is endeavoring to climb); to push up. 

  • To steal. 

  • To give a booster shot to. 

  • To amplify; to signal boost. 

  • To jump-start a vehicle by using cables to connect the battery in a running vehicle to the battery in a vehicle that won't start. 

noun
  • A positive intake manifold pressure in cars with turbochargers or superchargers. 

  • A coordinate transformation that changes velocity. 

  • A push from behind, as to one who is endeavoring to climb. 

  • Something that helps, or adds power or effectiveness; assistance. 

defeat

verb
  • To prevent (something) from being achieved. 

  • To nullify 

  • To reduce, to nothing, the strength of. 

  • To overcome in battle or contest. 

noun
  • The act or instance of being defeated, of being overcome or vanquished; a loss. 

  • Frustration (by prevention of success), stymieing; (law) nullification. 

  • The act or instance of defeating, of overcoming, vanquishing. 

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