Can a collective noun be a common noun?

The word 'crowd' is a common and a collective noun.

The word 'rouge' is a common noun unless it is used for something specific, such a Baton Rouge, Louisiana. It is not a collective noun; an appropriate collective noun under which it might be found...

The noun collection is a collective noun and a common noun.

The word 'drama' is a common noun, a singular, common, abstract noun. A collective noun is a word to designate a group of individual people or things as a single group such as a crew of workers, a...

There is no specific collective noun for "collective nouns." However, I have seen a list of collective nouns and a page of collective nouns.