lithiasis vs pathology

lithiasis and pathology both are nouns.

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

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

lithiasis (noun)	pathology (noun)
the formation of stones (calculi) in an internal organ	the branch of medical science that studies the causes and nature and effects of diseases
	any deviation from a healthy or normal condition