aphagia vs pathology

aphagia and pathology both are nouns.

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

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

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