centripetal vs radial

centripetal

adj
  • Directed towards the central nervous system; afferent. 

  • Directed or moving towards a centre. 

  • Of, relating to, or operated by centripetal force. 

radial

adj
  • Developing uniformly on all sides. 

  • Moving along a radius. 

  • Of, or relating to the radius bone. 

  • Of, or relating to the radius (vein), and/or the wing areas next to it. 

  • Arranged like rays that radiate from, or converge to a common centre. 

noun
  • A radial tire / radial tyre. 

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