A noun can function in a sentence as a subject, a direct object, an indirect object, a subject complement, an object complement, an appositive, an adjective, or an adverb.
Many common nouns can refer to men or women.
This is called gender specific nouns. Those that are still used occasionally tend to refer to occupational categories. In the possessive case, a noun or pronoun changes its form to show that it owns or is closely related to something else. Proper Nouns You always write a proper noun with a capital letter, since th noun represents the name of a specific person, place, or thing. A common noun is a noun referring to a person, place, or thing in a general sense- usually, you should write it with a capital letter only when it begins a sentence.