aggressive vs fierce

aggressive

adj
  • Characterized by aggression; unjustly attacking; prone to behave in a way that involves attacking or arguing. 

  • Female but having a male or masculine gender presentation: butch. 

  • Involving high risk for potentially high reward. 

  • That spreads quickly or extensively; virulent; malignant. 

  • Of heuristics, source code optimization techniques, etc.: exploiting every opportunity to be applied. 

noun
  • One who is aggressive. 

  • A (Black) woman who presents as masculine; a butch. 

fierce

adj
  • Exceedingly violent, severe, ferocious, cruel or savage. 

  • Excellent, very good. 

  • Resolute or strenuously active. 

  • Of exceptional quality, exhibiting boldness or chutzpah. 

  • Threatening in appearance or demeanor. 

adv
  • Extremely; very. 

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