Yup.
Magoosh has a free flash card app. Kaplan has a deck of flash cards if you can find a pack in your area. Both of these are good because they provide examples of how each individual word can be used in context.
Avoid Manhattan prep as their word list is often way too obscure.
ETS has shifted away from staunch dictionary definitions to being more-or-less contextual, so the word that fits exactly based solely on its definition alone would be an incorrect choice if it does not fit contextually.
The best way to prep for the Verbal Reasoning section is to mostly read. The New York Times, The Wall Street Journal, The Atlantic, The Economist, Scientific American, The New Left, American Conservative, and so on. Politics aside, the point is to read scholarly articles. Avoid articles based on opinion.
This is a good website that has a great mix of well-written, scholarly articles, from a variety of sources:
Arts & Letters Daily - ideas, criticism, debate
If you want to combine flash cards with the reading, The New York Times on-line has a search feature that allows to search by word. For example, you can search the word
circuitous and all articles containing that word will turn up.
I would also suggest reading classic American novels, preferably from the Victorian era.
There are plenty of free online word lists. Google "most frequent GRE words" to find them. Some lists can range upwards of 3,000 words. I'd stick with the one's that cap around 400 words.