What is an abstract noun for multiply?

There isn't a single perfect abstract noun for "multiply," as the concept can be understood in multiple ways. Here are some options depending on the context:

* Multiplication: This is the most direct and literal abstract noun, referring to the process itself.

* Increase: This implies a growth or expansion in quantity.

* Growth: This is similar to "increase" but can also refer to development or expansion in general.

* Proliferation: This suggests a rapid and widespread increase in number.

* Expansion: This emphasizes the widening or enlargement of something.

The best choice will depend on the specific meaning you want to convey.