ankylosis vs pathology

ankylosis and pathology both are nouns.

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

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

ankylosis (noun)	pathology (noun)
abnormal adhesion and rigidity of the bones of a joint	the branch of medical science that studies the causes and nature and effects of diseases
	any deviation from a healthy or normal condition