inflammable vs prickly

inflammable

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

  • Incapable of burning; not easily set on fire. 

  • Capable of burning; easily set on fire. 

noun
  • Any inflammable substance. 

prickly

adj
  • Easily irritated. 

  • Covered with sharp points. 

  • Difficult; complicated; hairy or thorny. 

noun
  • Something that gives a pricking sensation; a sharp object. 

adv
  • In a prickly manner. 

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