virulence

[1]	virulency , virulency , poisonousness , venomousness , toxicity , noxiousness , deadliness , perniciousness , injuriousness , destructiveness , malignity , malignancy , violence , balefulness
[2]	virulency , virulency , acrimony , acrimoniousness , bitterness , acerbity , rancour , spleen , poison , poisonousness , venom , venomousness , malignity , malevolence , maliciousness , malice , spite , hostility , resentment , antagonism , hatred