closed vs pure

closed

adj
  • Having the sound cut off sharply by a following consonant, like the /ɪ/ in pin. 

  • Lacking a free variable. 

  • Formed by closing the mouth and nose passages completely, like the consonants /t/, /d/, and /p/. 

  • Having component words joined together without spaces or hyphens; for example, timeslot as opposed to time slot or time-slot. 

  • Not public. 

  • Sealed, made inaccessible or impassable; not open. 

  • Not operating or conducting trade. 

  • Having an open complement. 

  • To be in a position preventing fluid from flowing. 

  • To be in a position allowing electricity to flow. 

  • Such that its image under the specified operation is contained in it. 

  • Whose first and last vertices are the same, forming a closed loop. 

pure

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

  • Free of foreign material or pollutants. 

  • Free of flaws or imperfections; unsullied. 

  • 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. 

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

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

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

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