malignant vs cancerous

malignant and cancerous both are adjectives.

Word	Noun	Adjective	Verb	Adverb
malignant	No	Yes	No	No
cancerous	No	Yes	No	No

malignant (adjective)	cancerous (adjective)
dangerous to health; characterized by progressive and uncontrolled growth (especially of a tumor)	like a cancer; an evil that grows and spreads
	relating to or affected with cancer