What are all common and proper nouns?

Examples:

The Word doctors is a common noun. Common nouns are not capitalized.

However, if you said Doctor Smith, that is a proper noun. The Word Doctor is capitalized.

The Word avenue is a common noun.

Used in an address, such as Second Avenue, it changes to a proper noun.

I can go to school, used here as a common noun. But I must capitalize it if I wrote the proper name, "I attend First Street High School."

I can tell you I read a book. But if "book" is part of the title of a book, such as "The Book of Spells", it is capitalized.

Other examples of proper nouns:

- all country, state, providence; counties; cities, towns; townships

- a title used before a person's name, such as President Obama. Pope, President, Vice-President, Mayor, Doctor

- titles, movies, books, articles -- except Words in the title like of, a, an, and