Have you ever tried Google Whacking? It's a great time waster and it really exercises your vocabulary. The trick is to find two words which, when submitted to the Google search engine, return exactly one page. It's harder than it looks. Putting the words in quotes is not allowed. There are a lot of web pages out there that are word lists. If your single, solitary result is a word list then it is disqualified. Here's one of my successful whacks: australopithecine nicety.