We don't have synonyms for napolean yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are napoleon, apogean and carolean.
(n) :
a gold coin worth twenty francs issued by Napoleon I; a twenty-franc coin
"1891: We had occasion some months ago to strengthen our resources, and borrowed, for that purpose, thirty thousand napoleons from the Bank of France. -- Arthur Conan Doyle, 'The Red-Headed League' (Norton 2005 p.67)"
(n) :
a gold coin worth twenty francs issued by Napoleon I; a twenty-franc coin
"1891: We had occasion some months ago to strengthen our resources, and borrowed, for that purpose, thirty thousand napoleons from the Bank of France. -- Arthur Conan Doyle, 'The Red-Headed League' (Norton 2005 p.67)"