WeboWord [weboword.com] is a visual vocabulary repository. The concept behind the website is similar to how we learnt new words as kids, that is through the use of educational picture books. As pictures are "worth a thousand words" and are "mentally stickier", learning new terms through this website should become more efficient.
The current available vocabulary includes terms like "Apiophobia", "Quixotic" and "Vertiginous". Users can submit own visualizations by sending entries to an email address.