The phrase 'hoard of' is correct and usable in written English.
You can use it to describe a large collection of something, often of a specific kind. For example, "The museum had a hoard of ancient artifacts."
— but a hoard of other stuff will.
As foreign trade surged, this hoard of dollars became enormous.
A hoard of weapons and ammunition was found at the man's home, the authorities said.
Much of Chile's hoard of copper, its main export, lies underneath what was Bolivian soil.
Without charisma, she contrives to shine.She starts the electoral season with a hoard of political capital.
With very little money, he had amassed in a lifetime a hoard of superb objets d'art.
The resulting hoard of cash prompted a hostile bid by Northern.
When they finally decided to visit his apartment they stumbled on the huge hoard of paintings.
That is partly because the elderly continue to live comfortably on their vast hoard of savings.
By return of post she received a hoard of 100 unpublished stories.
And Zynga's cash hoard of $1.65 billion was untouched from the third quarter.
