sum of money vs amount

sum of money and amount both are nouns.

Word	Noun	Adjective	Verb	Adverb
sum of money	Yes	No	No	No
amount	Yes	No	Yes	No

As nouns, sum of money and amount are synonyms defined as:

Other synonyms of sum of money include amount of money, sum.

sum of money (noun)	amount (noun)
a quantity of money	how much there is or how many there are of something that you can quantify
	the relative magnitude of something with reference to a criterion
	a quantity obtained by the addition of a group of numbers
	a quantity of money

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