pathology vs malignant

pathology is a noun but malignant is not a noun.

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

pathology (noun)	malignant (noun)
the branch of medical science that studies the causes and nature and effects of diseases
any deviation from a healthy or normal condition

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