you want to use the system view sys.synonyms, instead, which has everything you need:

select * from sys.synonyms

--rebuilding the command:

select

'CREATE SYNONYM '

+ quotename(SCHEMA_NAME(schema_id))

+'.'

+ quotename(name) --ie MyView

+ ' FOR '

+ base_object_name --ie [SandBox].[dbo].[VW_FIXEDWIDTH]

FROM sys.synonyms

--Results:

/*

CREATE SYNONYM [dbo].[MyView] FOR [SandBox].[dbo].[VW_FIXEDWIDTH]

*/