The abstract noun for "material" depends on what aspect of "material" you want to convey. Here are some possibilities:

* Matter: This refers to the substance of which physical objects are composed.

* Substance: This is a more general term for the essential nature of something.

* Materiality: This emphasizes the physical existence or reality of something.

* Stuff: This is a more informal term for material.

The best choice will depend on the specific context in which you are using the word.