head-on vs whole

head-on

adj
  • Direct, abrupt, blunt or unequivocal; not prevaricating. 

  • Of a collision, from the front or in the direction of motion. 

noun
  • A collision from the front. 

adv
  • With the front of a vehicle. 

  • With direct confrontation. 

whole

adj
  • Entire, undivided. 

  • Used as an intensifier. 

  • Sound, uninjured, healthy. 

  • From which none of its constituents has been removed. 

  • As yet unworked. 

adv
  • In entirety; entirely; wholly. 

noun
  • Something complete, without any parts missing. 

  • An entirety. 

How often have the words head-on and whole occurred in a corpus of books? (source: Google Ngram Viewer )