shield vs yield

shield

verb
  • To shelter; to protect oneself. 

  • To protect, to defend. 

  • to protect from the influence of 

noun
  • A large expanse of exposed stable Precambrian rock. 

  • A wide and relatively low-profiled volcano, usually composed entirely of lava flows. 

  • Parts at the front and back of a vehicle which are meant to absorb the impact of a collision 

  • A broad piece of defensive armor, held in hand, formerly in general use in war, for the protection of the body. 

  • One who protects or defends. 

  • A spot resembling, or having the form of a shield. 

  • A sign or symbol, usually containing numbers and sometimes letters, identifying a highway route. 

  • A framework used to protect workmen in making an adit under ground, and capable of being pushed along as excavation progresses. 

  • The escutcheon or field on which are placed the bearings in coats of arms. 

  • A field of energy that protects or defends. 

  • In lichens, a hardened cup or disk surrounded by a rim and containing the fructification, or asci. 

  • A police badge. 

yield

verb
  • To furnish; to afford; to render; to give forth. 

  • To produce as a result. 

  • To give, or give forth, (anything). 

  • To produce a particular sound as the result of a sound law. 

  • To produce as return, as from an investment. 

  • To give way; to succumb to a force. 

  • To give as required; to surrender, relinquish or capitulate. 

  • To pass the material's yield point and undergo plastic deformation. 

  • To admit to be true; to concede; to allow. 

  • To give way; to allow another to pass first. 

noun
  • Profit earned from an investment; return on investment. 

  • A product; the quantity of something produced. 

  • The explosive energy value of a bomb, especially a nuke, usually expressed in tons of TNT equivalent. 

  • The current return as a percentage of the price of a stock or bond. 

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