Proke, a word game by Peter Hastings, is all about vocabulary building... literally! The goal of it is to build a mighty tower to the heavens, and your only tools are quick thinking and linguistic fortitude. While racing the clock, type a word with the designated prefix, suffix, or, for extra height, both. The more words you type, the higher your little yellow stick-guy will build. Extra points can be scored for typing the letters that appear in Bonus Bubbles, or doing combos of words with same prefix/suffix.
Proke is a light kind of game, but it's very addictive. The only real goal is a high score, but sometimes that's enough. There are also different ranks to unlock by completing certain tasks, and some of them are killer. 15 words with "w" and "k" in them in a single round?! Yikes. Still, even if means cracking open volumes of the ol' OED, Proke will have great appeal to everyone's inner word-nerd.