One soon discovers that those fancy words are not Ænglish words at all. If you know 6 other languages, you will pass this test 100%.

Nice one, what I noticed is that out of 4 options 1 wrong is just something looking similar in letters, and 2 options are opposite meaning of each other - so actually the choice is 1 out of 2, not 4.

Also many highest difficulty words are actually combinations of multiple smaller words which makes it easier to guess, I got more right in expert/grandmaster than in advanced.

Fun game! I did worse than many others here, only 69.9k estimated words. But then English is my second language, so I'm pretty pleased with the result!

I wish it had keyboard shortcuts, it's a bit of a sludge to click through twice.

Got 64,650: 20/19/17/18/12 (the intermediate one was a dumb mistake)

The four options were generally:

* Correct word * Opposite definition * Another word's definition * Opposite of that word's definition

Which massively reduces the difficulty

Something is wrong with the estimation method -- I got 100/100 words correct (albeit the second time I did the test -- one word I had gotten wrong the first time occurred again), and it estimated my vocabulary at 85000 words. Given the stated methodology, the correct estimate should be 170000.

Really interesting, but I would love to be able to express honestly when I just guessed. This way the result would be much more scientifically sound. Four answers have a 25% chance of random correctness, which is a bit high in my opinion. I think either adding a "I don't know" or a confidence level (Known/educated guess/wild guess) would help.

Got a bit boring then suddenly very hard with some really esoteric words at the end in the ‘grandmaster’ level. It’d be nice if it got progressively harder without levels.

Some definitions were not great and alternatives a little silly at times but on the whole seemed pretty accurate.

Also probably needs calibrated as 96/100 was projected to 77k words, what would the estimate be for 100/100?

It's made with AI and I don't know to what extent. That's enough to have no trust in the results. As a non-native speaker I find those words weird. Some "core words" I have no idea about, but many of the expert ones are easy. So yeah, at least I hope the author had fun vibe-coding it.

84 total, with this breakdown: Core Basics 19/20 Intermediate 20/20 Advanced 13/20 Expert 15/20 Grandmaster 17/20

Scientific Estimate: 69 100 word

It began very simple, so that I took it not very serious for a moment, but I never heard many of the later words. But thanks to knowing some latin and other languages, I could understand many of them.

A fun idea!