Nouns often need a word called an article or determiner (like the or that). These words usually do not go with other kinds of words like verbs or adverbs. (For example, people do not also describe nouns. In English, there are more nouns than any other kind of word.
Every language in the world has nouns, but they are not always used in the same ways. They also can have different properties in different languages. For example, in some other languages, nouns do not change for singular and plural, and sometimes there is no word for the.