what is pronaun.?

A word that can function as a noun phrase used by itself and that refers either to the participants in the discourse or to someone or something mentioned elsewhere in the discourse.

word will act noun or noun phrase in the sentence

A pronoun (I, me, he, she, herself, you, it, that, they, each, few, many, who, whoever, whose, someone, everybody, etc.) is a word that takes the place of a noun. In the sentence Joe saw Jill, and he waved at her, the pronouns he and her take the place of Joe and Jill, respectively.
 

WORD WHICH ACTS AS A NOUN OR NOUN PHRASE

noun phrase

words that we use in place of noun are called pronouns

WORD WHICH ACTS AS A NOUN OR NOUN PHRASE