How do you force a rename???
Rename failed for Table 'dbo.x. (Microsoft.SqlServer.Smo)
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Find the "enforced dependencies", then remove or disable them.
By "enforced dependencies", it means Schema binding, so you'll have to look specifically for that.
Here's a query to look for schema binding references to your object:
select o.name as ObjName, r.name as ReferencedObj from sys.sql_dependencies d join sys.objects o on o.object_id=d.object_id join sys.objects r on r.object_id=d.referenced_major_id where d.class=1 AND r.name = @YourObjectName
As I noted in the comments, there is no way to FORCE-ibly override Schema Binding. When you use Schema Binding, you are explicitly saying "Do not let me or anyone else override this." The only way around Schema Binding is to undo it, and that's intentional.