GRE Bigbook Words that are not in Barrons
This is a wordlist compiled from 5000 Bigbook wordlist (http://www.jobsdiary.com/gre/wlist.php) and
Barrons wordlist (http://www.postech.ac.kr/~gla/gre/33new.txt) using a computer program.
There are around 2000 words. Most of them are quite easy though. Follow this link to download the file:
Hope it will be useful.