Hey! I'm reading some vitriolic assessments of the importance of vocab, and I'd say yes it is of great importance to do well on the verbal section of the test, but scrutinizing lists of 'top GRE words' and so forth is most likely going to be a waste of time. I'd recommend reading journal articles/books with a dictionary, and synonym games, or word games in general.
No practice tests, had an app for my phone called 'Synonyms Quiz' which I played constantly even before thinking about the GRE because it's fun as hell, but did not really study for math much outside a few Khan Academy videos, and ended up, as a humanities guy (NO EXCUSE FOR Q! I just knew that it wouldn't be of as much importance to adcomms), pretty content with my scores (except AW because I was loathe to address the first prompt and wrote a terrible essay).
166V (96%), 155Q (69%), 4AW (54%)
-e