Thesaurus.com is similar—it has closer synonyms scored higher. But also separates different meanings of a word. I think that it either has automated the proces

Thesaurus.com is similar—it has closer synonyms scored higher. But also separates different meanings of a word. I think that it either has automated the process of finding synonyms, or started with a corpus like the one you're talking about. I wish there was a quality open thesaurus, because Thesaurus.com's interface is annoying sometimes, and I could use some integration with a dictionary. Wiktionary's efforts aren't quite there yet.