ignitable vs inflammable

ignitable

adj

  • Capable of being ignited; able to burn. 

inflammable

adj

  • Capable of burning; easily set on fire. 

  • Incapable of burning; not easily set on fire. 

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

noun

  • Any inflammable substance. 

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