We don't have synonyms for spur-ryal yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are spur-royal, spur ryal and spur-rial.
(n) :
Alternative form of spur-royal. [(historical) A former English gold coin, first made in the reign of Edward IV, when it was worth ten shillings, and worth fifteen shillings during Mary I and Elizabeth I's reign. It had a star on the reverse.]
(n) :
Alternative form of spur-royal. [(historical) A former English gold coin, first made in the reign of Edward IV, when it was worth ten shillings, and worth fifteen shillings during Mary I and Elizabeth I's reign. It had a star on the reverse.]