Here’s Wordnik: a dictionary on steroids. Type in a word or phrase, even slang and nonstandard words, and you get:
- definitions from several dictionaries
- etymologies
- examples from literature
- examples from Twitter
- synonyms and antonyms
- “hypernyms” – words that are more abstract, e.g. “greeting” for “hello”
- rhymes
- discussion
- images from Flickr and audio pronunciation, though neither seems to be working at the moment
- Scrabble score
Have fun!
Brian D. Buckley 
Yikes. I’m going to have to limit my time on this site.
I looked up “gerund” and I found this phrase: “a Latin verbal noun, used in oblique cases with an infinitival value.” I have no idea what that means, at least the “oblique” and “infinitival” part, but I feel smarter already! 🙂
Sounds like a bona fide erudition augmentation. 😀