axial vs salient

axial

adj
  • In the same direction as the axis, parallel to the axis. 

  • Belonging to the axis of the body, or to the axis of any appendage or organ 

  • Relating to, resembling, or situated on an axis 

  • oriented close to the axis running through the centre of a cyclohexane ring, as opposed to equatorial. See w:Axial bond. 

noun
  • A plane parallel to the surface of a tooth. 

  • A flight feather that appears between the primaries and secondaries on some birds. 

salient

adj
  • Denoting any angle less than two right angles. 

  • Worthy of note; pertinent or relevant. 

  • Projecting outwards, pointing outwards. 

  • Depicted in a leaping posture. 

  • Prominent; conspicuous. 

noun
  • An outwardly projecting part of a fortification, trench system, or line of defense. 

  • 1919, “General Pershing's Story”, in Americans Defending Democracy: Our Soldiers' Own Stories, World's War Stories, Inc., page 9 

  • 1978, Jan Morris, chapter 9, in Farewell the Trumpets, New York: Harcourt Brace Jovanovich, page 193 

  • On April 26 the First Division had gone into the line in the Montdidier salient on the Picardy battlefront. 

  • The battlefronts were often no more than a few hundred yards wide, and the salients never more than a few miles deep. 

  • An elongated protrusion of a geopolitical entity, such as a subnational entity or a sovereign state. 

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