A proper noun or proper name is a noun representing a unique thing (such as London, Jupiter, John Hunter, or Toyota), as opposed to a common noun, which represents a class of things (for example, city, planet, person or corporation). Proper nouns are the only nouns in English which have the first letter capitalized.
Pencil proper or common noun
Some common nouns for the proper noun Toyota are:corporationcompanyemployervehiclecartruck
The word Toyota is a proper noun, it is a name of a specific company and a specific brand.
"Park Avenue" is a proper noun, because it is a place. Proper nouns like this should always be capitalized.
Common
It is a proper noun, because it is the name of a specific thing.
proper
Proper noun
it's a common noun. a proper noun would be Spider-Man.
Proper noun or common noun
The noun cassette is a common noun.
a common noun?