point in time vs amount

point in time and amount both are nouns.

Word	Noun	Adjective	Verb	Adverb
point in time	Yes	No	No	No
amount	Yes	No	Yes	No

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

point in time: an instant of time
amount: how much there is or how many there are of something that you can quantify

Other hypernyms of point in time include measure, quantity.

point in time (noun)	amount (noun)
an instant of time	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

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