Light cruiser and scout cruiser as alternative labels

What term would suit a heavy cruiser if battlecruisers were called frigates?

The proposed pair is light cruiser for the later heavy-cruiser type and scout cruiser for the smaller category.

The answer retains light cruiser for ships that later became known as heavy cruisers. It uses scout cruiser to distinguish the other group. This follows the earlier argument that treaty labels obscured a classification based on cruiser roles.