fierce synonyms

deep intense acute ardent fervent

bloody animal dangerous wild terrible severe angry rough mad awful violent desperate threatening aggressive primitive hostile cruel furious bold savage grim frightening passionate vicious devastating destructive brutal fearful ruthless lowering frantic turbulent insane raging stormy monstrous menacing ferocious howling uncontrolled fearsome enraged murderous frenzied raving fanatical frightful torrential malevolent boisterous venomous merciless virulent irate feral thunderous vehement tumultuous unrestrained impetuous hellish barbarous unbridled rabid malign brutish bloodthirsty truculent untamed blustering bestial inclement ravening uncivilized wrathful tigerish sanguinary cyclonic