Here’s a pretty good test:
http://testyourvocab.com/
I hear zombies have 32 words for ‘brains.’
How can this thread have 38,000 views and only 22 replies? Is that some kind of record?
Interesting (and the test was kind of fun). They claim that the average is about halfway between stringy’s cite of 45K and Epimetheus’s cite of 10K.
I’ll eat my hat if any two posters can agree on the same definition of “word”.
Certainly not compared to the British or Australians. I have found Americans to be far better communicators than other English speakers.
I agree with you 100%. (Whatever your definition may be.)
Now for the hat-eating…
I’ve never come up with a definition that I agree with myself – so my hat is safe so far.
Interesting observation, I for one would like to know how you came to draw such a conclusion.
:dubious:
Similar thread on sister site. Here.
The second amendment helps. 
two weeks
For the first question –
I have a 173,000 entry word list in a text file. I just drew 40 random words from it and I knew 30 of them, so I guess I know in the ballpark of 140,000 words. My vocabulary is probably pretty standard for an educated native speaker (not poor but not freakish), so there’s my vote:
–> about 140,000 words