vehemence

noun3

1. •
   An intense concentration, force or power.

   • The bear attacked with vengeance and vehemence.
2. •
   A wild or turbulent ferocity or fury.

   • His response was bursting with hatred and vehemence.
3. •
   Eagerness, fervor, excessive strong feeling.

   • I could not wonder at the vehemence of her care, her very soul was tenderness […] — 1826