axletree vs goad

axletree

noun
  • A stimulus or driving force. 

  • A bar or beam of wood or iron, connecting the opposite wheels of a carriage, on the ends of which the wheels revolve. 

  • A spindle or axle of a wheel. 

goad

noun
  • That which goads or incites; a stimulus. 

  • A long, pointed stick used to prod animals. 

verb
  • To encourage or stimulate. 

  • To incite or provoke. 

  • To prod with a goad. 

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