pathological vs pathology

pathological is not a noun while pathology is a noun.

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

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

pathological (adjective)	pathology (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