Is a noun verb adjective or adverb?

"Noun", "verb", "adjective", and "adverb" are parts of speech. They are not themselves nouns, verbs, adjectives, or adverbs.

Here's a breakdown:

* Noun: A word that names a person, place, thing, or idea. (e.g., *dog, city, table, happiness*)

* Verb: A word that describes an action or state of being. (e.g., *run, sleep, think, exist*)

* Adjective: A word that describes a noun. (e.g., *big, red, happy, interesting*)

* Adverb: A word that describes a verb, adjective, or another adverb. (e.g., *quickly, slowly, very, extremely*)

So, "noun" is a noun, "verb" is a noun, "adjective" is a noun, and "adverb" is a noun.