inadequacy vs amount

inadequacy and amount both are nouns.

Word	Noun	Adjective	Verb	Adverb
inadequacy	Yes	No	No	No
amount	Yes	No	Yes	No

As nouns, amount is a hypernym of inadequacy; that is, amount is a word with a broader meaning than inadequacy:

inadequacy (noun)	amount (noun)
unsatisfactoriness by virtue of being inadequate	how much there is or how many there are of something that you can quantify
lack of an adequate quantity or number	the relative magnitude of something with reference to a criterion
a lack of competence	a quantity obtained by the addition of a group of numbers
	a quantity of money

inadequacy (verb)	amount (verb)
	to measure up to in kind or quality
	add up in number or quantity
	be tantamount or equivalent to