Nouns express the names of persons, places, things, and qualities etc.
Nouns are of five main kinds
1. Common nouns: Words that express different animals, plants etc.
2. Proper noun: words that denote a specific person or a place.
3. Collective nouns: Word that express a collection of persons or things
4. Abstract noun: Names of quality, state of mind or a stage of life.
5. Material noun: Words that refer to metals and materials