Malignant

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Hostile

Synonyms Spiteful, malevolent, malign, baleful, vicious, poisonous, acrimonious, splenetic, hostile, malicious, evil-intentioned, full of hate, nasty, venomous, rancorous, and cruel.

Virulent

Synonyms Virulent, invasive, dangerous, pernicious, fatal, lethal, incurable, infectious, uncontrollable, harmful, deadly, life-threatening, and terminal.

Example Sentences

The biopsy revealed a malignant tumor.

Malignant cells can spread rapidly.

Doctors removed the malignant growth.

She feared the diagnosis was malignant.

Malignant diseases require urgent treatment.