pure vs waterproof

pure

adj
  • Free of flaws or imperfections; unsullied. 

  • Of a single, simple sound or tone; said of some vowels and the unaspirated consonants. 

  • Free of foreign material or pollutants. 

  • Done for its own sake instead of serving another branch of science. 

  • Mere; that and that only. 

  • Without harmonics or overtones; not harsh or discordant. 

  • A lot of. 

  • Free of immoral behavior or qualities; clean. 

noun
  • One who, or that which, is pure. 

adv
  • to a great extent or degree; extremely; exceedingly. 

verb
  • to hit (the ball) completely cleanly and accurately 

waterproof

adj
  • Incapable of failing; unassailable. 

  • Resistant to the effects of water. 

  • Made of or covered with material that doesn't allow water in. 

verb
  • To make waterproof or water-resistant. 

noun
  • A substance or preparation for rendering cloth, leather, etc., impervious to water. 

  • Cloth made waterproof, or any article made of such cloth, or of other waterproof material, as rubber; especially, an outer garment made of such material. 

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