inflammable vs nonflammable

inflammable

adj

  • Incapable of burning; not easily set on fire. 

  • Capable of burning; easily set on fire. 

  • Easily excited; set off by the slightest excuse; easily enraged or inflamed. 

noun

  • Any inflammable substance. 

nonflammable

adj

  • Not easily set on fire. 

  • Not combustible. 

noun

  • Any nonflammable substance. 

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