grand total vs amount

grand total and amount both are nouns.

Word	Noun	Adjective	Verb	Adverb
grand total	Yes	No	No	No
amount	Yes	No	Yes	No

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

Other hypernyms of grand total include sum, total.

grand total (noun)	amount (noun)
the sum of the sums of several groups of numbers	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

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