How many words do you know?

Jellies are a pretty intelligent bunch, so I bet everybody here has a pretty high vocabulary. I just found this test which estimates how many words you know. The average for adults who are native English speakers is 20,000–35,000.

I tried to be very honest and got ~31,000. There were a lot of words where I sort of had a vague idea what they meant, but wasn’t 100% sure, and that bothered me. It makes me wonder how much I’m actually getting out of reading if I’m not sure about all these words. Time to hit the books!