I've found a useful site which enables you to create your own sets of flash cards - which you can play various games with, as well as using it to learn the words. The site will remember which words you get right. I've created a set with three-letter SOWPODS Scrabble words containing only consonants . There are 19 words to learn, plus their meanings, including such gems as myc, lym, wyn, tyg and many others.