What is the name for noun which pronoun stands?

The name for the noun that a pronoun stands for is called the antecedent.

Here's an example:

* She went to the store.

In this sentence, "she" is the pronoun, and "she" stands for the antecedent "girl" (even though it's not explicitly stated).

Think of it this way:

* Antecedent = The noun that comes before the pronoun.

* Pronoun = The word that replaces the noun.