References to synonyms are not schema-bound; therefore, you can drop a synonym at any time. References to dropped synonyms will be found only at run time.
Synonyms can be created, dropped and referenced in dynamic SQL.
USE tempdb;
GO
-- Create a synonym for the Product table in AdventureWorks.
CREATE SYNONYM MyProduct
FOR AdventureWorks.Production.Product;
GO
-- Drop synonym MyProduct.
USE tempdb;
GO
DROP SYNONYM MyProduct;
GO