These cards include all the words,meanings and example sentences in the barrons GRE book. I made this database off a PDF I found somewhere. There are some typos here and there but no major typos.
I strongly advise you to delete any words which you already know from before so that you don't waste time on them.
All the best for your preparation, I hope you get a good GRE score :)
Barrons GRE Prep