OXFORD DICTIONARY
Franc, n. the chief monetary unit of France, Belgium, Switzerland, Luxemburg, and several other countries.
ME f. OF f. Francorum Rex king of the Franks, the legend on the earliest gold coins so called (14th c.): see FRANK
THESAURUS
Franc
Deutschmark, Mark, Reichsmark, afghani, anna, baht, cent, centavo, centime, conto, dollar, dong, florin, guilder, gulden, kip, kopeck, krona, krone, lira, milreis, peseta, pie, piece of eight, pistareen, pound, rand, rial, ruble, rupee, shekel, shilling, sol, sou, stiver, won, yen