A Flood.
A large amount of rock fall is called an avalanche.
If a large amount of gold is closely held, it may be called a hoard of gold.
obesity
A large amount of individual products is often referred to as inventory or stock in the industry.
Yes, a sewage drain pipe can be too large.
When a business or a firm produce large amount of production, then it is called large scale of production.
Avalanche.
Wolves were created to run, chase, and kill large animas. They eat, and prevent the animal popultion from overflowing.
air masses
A large amount of gas and dust spread out in an immense volume is called a nebula. Nebulas are vast clouds of interstellar material where new stars are born.
On the bottom of the radiator is a large drain plug.
Plateau