We don't have synonyms for petrodollar yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are eurodollar and petrodollars.
(n) :
(oil industry, chiefly in the plural, also attributively) Money (either notionally or specifically in dollars or other currencies) earned from the sale of oil, often especially as considered among a national economy's principal revenue streams.
(n) :
(oil industry, chiefly in the plural, also attributively) Money (either notionally or specifically in dollars or other currencies) earned from the sale of oil, often especially as considered among a national economy's principal revenue streams.