Are noun and subject the same thing?

No, nouns and subjects are not the same thing, though they are related. Here's the breakdown:

* Noun: A word that names a person, place, thing, or idea. Examples: "dog," "school," "happiness," "John."

* Subject: The part of a sentence that performs the action or is described by the verb. It's the who or what the sentence is about.

Here's how they connect:

* The subject of a sentence is usually a noun or a pronoun. For example:

* The cat sat on the mat. ("Cat" is the noun acting as the subject)

* She went to the store. ("She" is a pronoun acting as the subject)

Key Difference:

The noun is simply the word itself, while the subject is the grammatical function that noun (or pronoun) plays in the sentence.

Think of it this way:

* Noun: The building block

* Subject: The role the block plays in the structure