Noun
A noun is a word which is used as the name of a person, place or thing.
Example Rana Pratap, king, Mewar, Ujjwal, Ghaziabad, book,table,sun, love etc.
Pronoun
A pronoun is a word used in place of a noun.
Example he, she, they, his etc.
Adjective
An adjective is a word used to add something to the meaning of a noun.
Example white, good, naughty, etc