Nouns don't have 'parts', nouns are just words or several words that mean a person, a place, or a thing.
If you mean, what part or role does a noun play, a noun functions as the subject of a sentence or a clause and as the object of a verb or a preposition. Some examples of noun uses in sentences:
Noun subject of sentence: Aunt Jane made cookies for the children.
Noun subject of clause: The cookies that Aunt Jane made are for the children.
Noun object of verb: Aunt Jane made cookies for the children.
Noun object of preposition: Aunt Jane made cookies for the children.
Nouns typically consist of a headword, which is the core noun itself, along with any determiners that come before it (like articles or possessive pronouns) and any modifiers that come after it (like adjectives or prepositional phrases). This combination of elements helps to specify and describe the noun in a sentence.
The part of speech for "answer" is a noun.
Permission is a noun.
Noun is a noun.
noun
The part of speech for "archaeologist" is a noun.
A noun, specifically a proper noun.
Touchdown is a noun.
Noun
The word "misconception" is a noun.
It can be a noun or part of a verb.
Noun.
Noun