cantilever vs spar

cantilever

noun
  • A beam anchored at one end and projecting into space, such as a long bracket projecting from a wall to support a balcony. 

  • A beam anchored at one end and used as a lever within a microelectromechanical system. 

  • A technique, similar to the spread eagle, in which the skater travels along a deep edge with knees bent and bends their back backwards, parallel to the ice. 

verb
  • To project (something) in the manner of or by means of a cantilever. 

spar

noun
  • A beam-like structural member that supports ribs in an aircraft wing or other airfoil. 

  • Any crystal with readily discernible faces. 

  • A rafter of a roof. 

  • A thick pole or piece of wood. 

  • A sparring session; a preliminary fight, as in boxing or cock-fighting. 

  • Any of various microcrystalline minerals, of light, translucent, or transparent appearance, which are easily cleft. 

  • Any linear object used as a mast, sprit, yard, boom, pole or gaff. 

verb
  • To contest in words; to wrangle. 

  • To supply or equip (a vessel) with spars. 

  • To fight, especially as practice for martial arts or hand-to-hand combat. 

  • To strike with the feet or spurs, as cocks do. 

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