Same word as vehement:

angry, ardent, concentrated, delirious, desperate, eager, earnest, emphatic, enthusiastic, exquisite, fervent, fervid, fierce, fiery, forceful, forcible, frantic, furious, hearty, heated, hopped up, hot, hyper, impassioned, impetuous, inflamed, intense, lively, on the make, potent, powerful, pronounced, rabid, strong, terrible, vicious, violent, wild, zealous