pathology vs benign

pathology is a noun but benign is not a noun.

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

pathology (noun)	benign (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)	benign (adjective)
	pleasant and beneficial in nature or influence
	not dangerous to health; not recurrent or progressive (especially of a tumor)
	kindness of disposition or manner