Malignancy1. (n.) The state or quality of being malignant; extreme malevolence; bitter enmity; malice; as, malignancy of heart.
2. (n.) Unfavorableness; evil nature.
3. (n.) Virulence; tendency to a fatal issue; as, the malignancy of an ulcer or of a fever.
4. (n.) The state of being a malignant.
Thesaurus Entries
balefulness, banefulness, bitchiness, communicability, contagiousness, cussedness, deadliness, despite, destructiveness, detrimentalness, devilment, devilry, deviltry, evil intent, fatality, grudge, harmfulness, hatefulness, hurtfulness, ill will, infectiousness, infectivity, iniquitousness, injuriousness, invidiousness, lethality, maleficence, malevolence, malice, malice aforethought, malice prepense, maliciousness, malignance, malignity, meanness, mischievousness, mortality, nastiness, noisomeness, noxiousness, ominousness, orneriness, perniciousness, poison, poisonousness, spite, spitefulness, spleen, toxicity, unhealthiness, venom, venomousness, viciousness, virulence, virulency, wickedness