To accumulate something is to collect it over time. When you accumulate money, you save it up so that you can use it later.
He amassed a large amount of money by being smart with his investments.
She amassed a large amount of books over the years.
verb
To collect into a mass or heap.
verb
To gather a great quantity of; to accumulate.
adjective
Having been gathered or assembled in a large group.
1
In addition, he has amassed a large collection of historical ballpoint pens.
2
They amassed the evidence related to the crime.
3
He was ordered to amass the objects in array.
4
He had amassed a great fortune.
5
They amass informations all over the world.
6
They did not require the workers to amass the money.
7
In a long career, the scrupulous Lemercier amassed no fortune.
8
The mutants amass and prepare to wipe out the humans.
9
The object of the game is to amass 12 victory points.
10
This is not the place to amass the evidence on one side or the other.