pathology vs pathological

pathology is a noun but pathological is not a noun.

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

pathology (noun)	pathological (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)	pathological (adjective)
	of or relating to the practice of pathology
	caused by or evidencing a mentally disturbed condition
	caused by or altered by or manifesting disease or pathology