virulent

As adjectives the difference between adverse and virulent

is that adverse is unfavorable; antagonistic in purpose or effect; hostile; actively opposing one's interests or wishes; contrary to one's welfare; acting against; working in an opposing direction while virulent is highly infectious, malignant, or deadly.

As adjectives the difference between virulent and virulented

is that virulent is (chiefly|medicine|of a disease or disease-causing agent) highly infectious, malignant or deadly while virulented is (obsolete) made virulent; poisoned.

As adjectives the difference between virulent and hypervirulent

is that virulent is (chiefly|medicine|of a disease or disease-causing agent) highly infectious, malignant or deadly while hypervirulent is extremely virulent.

As adjectives the difference between virulent and supervirulent

is that virulent is (chiefly|medicine|of a disease or disease-causing agent) highly infectious, malignant or deadly while supervirulent is especially virulent.

As adjectives the difference between virulent and avirulent

is that virulent is highly infectious, malignant, or deadly while avirulent is not virulent.

As an adjective virulent

is highly infectious, malignant, or deadly.

As a noun neurovirulence is

virulent disease of the nervous system, especially that caused by a neurovirulent virus.