testyourvocab.com estimates I know more words than average.  Three years of high school Latin pays of in recognition of uxoricide.

Your total vocabulary size is estimated to be:

35,400 words

This is the estimated number of entries in a standard dictionary for which you know at least one definition.

David Ing’s score on Test Your Vocabulary.

That’s more than the average person, and in the range of the typical college attendee.  See “New results for English speakers” | July 25, 2011 | testyourvocab.com at http://testyourvocab.com/blog/2011-07-25-New-results-for-native-speakers.php#mainchartNative

Via Stephen Perelgut (with a score of 41,000) on Facebook.