I somehow forgot to mention this: don’t worry too much about rehearsing words. This is not the most effective way to learn them in most cases, because your brain just doesn’t consider something important and worth remembering until it has a very, very good reason to; forcing the repetition of certain words that way usually doesn’t happen to be that reason.
If you know it works for you, though, then go ahead, but otherwise, don’t beat yourself up and don’t give it more time than it deserves. After all, if you don’t happen to ever use the word or even see or hear it in five years or even more, then why really bother? ;)