insurgent vs rebel

insurgent

noun
  • One of several people who take up arms against the local state authority; a participant in insurgency. 

adj
  • Rebellious, opposing authority. 

  • Of water: surging or rushing in. 

rebel

noun
  • A person who resists an established authority, often violently. 

  • Synonym of Confederate: a citizen of the Confederate States of America, especially a Confederate soldier. 

verb
  • To resist or become defiant toward an authority. 

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