There are web sites for just about anything you care to mention, but there is one site which could be useful to people who can't find the right word for a situation which I have never been able to find.
Sometimes I might be ........ Oh, what's the word I'm looking for? You must know that annoying feeling when the word you want is on the tip of your tongue, but it just won't come out. No matter how hard you try, or how long you leave it till later, it remains as ............ (..... erm........ erm DOH! What's the word I'm looking for......... It means 'hard to find'. Oh yes, that's it...... 'Illusive'.) ...... it remains as illusive as ever.
Now its OK if you have another word which would relate to the word you are looking for. In the above case, I could perhaps type in 'rare' and look at the synonyms. But if I can't even think of a related word and type in 'hard to find', there are no clues to be found in the synonyms.
So where is the web site which will help me spit out that word which tantalizingly plays on the tip of my tongue, but refuses to pop out? Is there such a site?