EXAMPLES FROM THE WEB FOR COMMON NOUN
It is a common noun, and not the name of one particular place.
A common noun is a name which belongs to all things of a class of objects.
Do not capitalize the common noun if it follows the proper name.
It will be observed that in many places I have capitalized the common noun Lake.
The common noun was made a proper name, and a legend by degrees attached to it.
Peak may be in some cases from the Derbyshire Peak, which has, however, no connection with the common noun peak.
This is now replaced as a common noun by the French word nephew, but it survives in the surname Neave.
Thus "John Smith" (particular; proper noun) and "Man" (general; common noun).
A common noun is a name which may be applied to any one of a class of persons, places, or things.
A proper noun becomes a common noun when used as a name that may be applied to any one of a class of objects.