What is an example for not a noun?

If a Word is not a noun, it can be:

• a verb, a Word for an action or a state of being
• an adjective, a Word that describes a noun
• an adverb, a Word that modifies a verb, an adjective, or another adverb
• an article, a Word used with a noun to limit it or make it clearer
• a pronoun, a Word that takes the place of a noun
• a preposition, a Word that links a noun to another Word
• a conjunction, a Word that joins Words, clauses, or sentences
• an interjection, a Word or group of Words that is exclaimed