malignant

Plural: malignants

Adjective

dangerous to health; characterized by progressive and uncontrolled growth (especially of a tumor)

Adj

Harmful, malevolent, injurious.
Tending to produce death; threatening a fatal issue.

Noun

A deviant; a person who is hostile or destructive to society.
A person who fought for Charles I in the English Civil War.

Examples

a malignant tumor
malignant diphtheria
malignant temper; malignant revenge; malignant infection

Origin / Etymology

From Middle French malignant, from Late Latin malignans. See malign.

Antonyms

benign, non-malignant

Scrabble Score: 12

malignant: valid Scrabble (US) TWL Word
malignant: valid Scrabble Word in Merriam-Webster MW Dictionary
malignant: valid Scrabble Word in International Collins CSW Dictionary

Words With Friends Score: 17

malignant: valid Words With Friends Word