analphabetism vs inability

analphabetism and inability both are nouns.

Word	Noun	Adjective	Verb	Adverb
analphabetism	Yes	No	No	No
inability	Yes	No	No	No

As nouns, inability is a hypernym of analphabetism; that is, inability is a word with a broader meaning than analphabetism:

analphabetism (noun)	inability (noun)
an inability to read	lacking the power to perform
	lack of ability (especially mental ability) to do something