1. Common Noun
The names given to common persons, places, animals or things.
Examples:
boy, city, dog, school, pen
2. Proper Noun
The names given to particular persons, places, animals or things.
Examples:
Rahul, Mumbai, Tommy, Taj Mahal, Ganga
3. Collective Noun
The name of a group of persons, animals or things.
Examples:
team, class, herd, flock, bunch
4. Material Noun
The names of materials from which things are made.
Examples:
gold, water, wood, iron, cotton