Moral is a synonym of Virtual. Virtual is a different concept from Physical. Physical is related to Weight. Weight is a different concept from Size. 
Cat is related to Copy. Cast is a type of Copy. 
Moral <--Synonym--> Virtual <--DistinctFrom--> Physical <--RelatedTo--> Weight <--DistinctFrom--> Size 
Cat <--RelatedTo--> Copy <--IsA-- Cast 