Something with vehemence is forceful and energetic. If you passionately believe that your neighbor is mistreating his dog, speak to him with vehemence.
Vehemence is the quality of being vehement, or powerful. We often describe passionate speeches as having vehemence. You could also describe a violent natural event as vehement. A hurricane sweeps onto coastal land with destructive vehemence. If your dancing style is wild and involves throwing your limbs every which way as fast as possible, then you dance with vehemence.