Is the rolling stone proper or common noun?

Answer 1

The noun roll is a common noun, a word for any roll of anything.

A common noun becomes a proper noun when it is the name of a person, place, thing, or a title; for example:

• Roll, Oklahoma; Roll, Arizona; or Roll, Indiana
• Kenneth Roll DDS, Kingston, NY
• The Rock and Roll Hall of Fame
• Rolls-Royce

Answer 2

The compound noun 'rolling stone' is a common noun, a word for any rolling stone in general. The rock group called The Rolling Stones is a proper noun, the name of a specific thing. A proper noun is always capitalized.