Common - proper noun
From Hull AWE
- Common nouns are the names of ordinary, everyday people, places, things, animals, ideas etc.: a man, a town, a desk, a dog, a car, a bridge, a religion, etc.
- Proper nouns are the special names given to particular examples of common nouns, e.g. Peter, Hull, Rover [a dog], Rover [a car], the [Humber] Bridge, Christianity, etc. Proper Nouns are the ones you should write with Capital Letters.