Do the following to get a list of Objects by their API names:
- Pop in to Workbench
- Run the following query:SELECT SobjectType FROM ObjectPermissions
- Click Bulk CSV to download
- Click the query button to execute
- Open in Excel and Dedupe
A quick and easy way to generating a list for creating backups using ‘Backup-force.com’: https://github.com/neowit/backup-force.com