Hi, I am new to GRE. I just graduated, and hoping on going for MS Degree. I haven't taken GRE Before, this would be my first time. I have some queries, that I was wondering you guys can answer.

First of all, is 1 month enough for preparing for GRE? How difficult is GRE? and also, I have some questions regarding vocabulary. Barron's have a master word list in their book. which has about 3,000 words in it. Do we really have to go through those lists? or, just the high-frequency words would be enough to get a good score?

Thanks.