Noun:

The simplest definition of a noun is a thing and nouns are the basic building blocks of sentences. These things can represent a person, animal, place, idea, emotion &ndash... আরও পড়ুন

Noun:

The simplest definition of a noun is a thing and nouns are the basic building blocks of sentences. These things can represent a person, animal, place, idea, emotion – almost any thing that you can think of. 

Pronoun:

A pronoun is a word that is used instead of a noun or noun phrase. Pronouns refer to either a noun that has already been mentioned or to a noun that does not need to be named specifically.