Is the word laughter a v n adj proper noun?

Here's the breakdown of the word "laughter" and its grammatical category:

* Noun: "Laughter" is a noun. It represents the act or sound of laughing.

Let's look at why it's not the other options:

* Verb: While we can *laugh*, "laughter" itself doesn't describe an action.

* Adjective: Adjectives describe nouns. "Laughter" isn't used to describe something else.

* Proper Noun: Proper nouns are specific names (like "John" or "London"). "Laughter" is a general term.

In summary: "Laughter" is a common noun.