Visual Dictionary
Related words means that they are connected in one way on another. Related concepts/words form a graph (sometimes called wordnet). This VisualDict is supposed to replace google phrasebook, which is hardly editable, low performance, is limited to 5000 words or so and does not permit grouping related words in way other than linear list of pairs.
I have implemented it usig Google Realtime API for DB (theoretically, you can share a dictionary and build it collaboratively ) and almende front-end. Check out the demo at http://valtih1978.github.io/VisualDict/almende-vis.html.