buffalo vs strengthen

buffalo

verb
  • To outwit, confuse, deceive, or intimidate. 

  • To hunt buffalo. 

noun
  • A related North American animal, the American bison, Bison bison. 

  • The buffalo fish (Ictiobus spp.). 

  • Any of the Old World mammals of the family Bovidae, such as the Cape buffalo, Syncerus caffer, or the water buffalo Bubalus bubalis. 

  • A nickel. 

strengthen

verb
  • To make strong or stronger; to add strength to; to increase the strength of; to fortify. 

  • To empower; to give moral strength to; to encourage; to enhearten. 

  • To reinforce, to add to, to support (someone or something) 

  • To grow strong or stronger. 

  • To substantiate; to corroborate (a belief, argument, etc.) 

  • To augment; to improve; to intensify. 

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