We don't have synonyms for crockard yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are crockery, crocked and crocard.
(n) :
(historical, numismatics) A 13th-century coin minted in Europe as a debased counterfeit copy of the sterling silver penny of King Edward I, at first legally accepted as a halfpenny and then outlawed.
(n) :
(historical, numismatics) A 13th-century coin minted in Europe as a debased counterfeit copy of the sterling silver penny of King Edward I, at first legally accepted as a halfpenny and then outlawed.