cash advance vs amount of money

cash advance and amount of money both are nouns.

Word	Noun	Adjective	Verb	Adverb
cash advance	Yes	No	No	No
amount of money	Yes	No	No	No

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

Other hypernyms of cash advance include amount, sum, sum of money.

cash advance (noun)	amount of money (noun)
an amount paid before it is earned	a quantity of money