sclerosis vs pathology

sclerosis and pathology both are nouns.

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

As nouns, pathology is a hypernym of sclerosis; that is, pathology is a word with a broader meaning than sclerosis:

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