We don't have synonyms for world economy yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are old economy.
(N) :
The world economy or global economy is the economy of all humans in the world, referring to the global economic system, which includes all economic activities conducted both within and between nations, including production, consumption, economic management, work in general, financial transactions and trade of goods and services.
(N) :
The world economy or global economy is the economy of all humans in the world, referring to the global economic system, which includes all economic activities conducted both within and between nations, including production, consumption, economic management, work in general, financial transactions and trade of goods and services.