http://toxi.co.uk/p5/base26

Because four-letter words have a special status in the English language and culture ‘base26′ was done to give an overview of (almost) all English four-letter words and to visualize their relations to each other.
Each point is a presentation for a four-letter-word with a position based on 4D coordinates for x,y,z and time. The colors indicate types of words and the wireframe surface depicts the frequency of occurence of letter combinations. (toxi.co.uk/p5/base26)