To improve your verbal score, I'd suggest you can use tweak GRE flashcards (https://play.google.com/store/apps/details?id=com.tweakgreflashcards)
It has around 1000 words grouped based on their meanings. Something like a group name will be "cheat" and around 10 words that mean cheat will be inside that group.
So during the test even if you cannot recollect the exact meaning, recollecting which group it was in should give you some context.
The app is online available on Android though.