Trivia Quiz
English Vocabulary Test
How many English words do you know? Check the words you know and get an estimate of your English vocabulary size.
GIGGLEUS Vocabulary Test
How many English words do you know?
Just check the words you know and we'll estimate the size of your English vocabulary. The list mixes everyday words with rare ones.
· Tap only the words whose meaning you actually know.
· Be honest for accuracy — guessing throws off the estimate.
· 48 words are shown, mixing real words with trap non-words.
· We statistically estimate your total vocabulary from your hit rate in each frequency band (an estimate, not an exact count).
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How many English words do you actually know? This vocabulary size test shows 48 words: 40 real words, eight from each of five frequency bands running from everyday basics to rare words like "susurrus", plus 8 invented trap words. Tick only the ones whose meaning you know. Your hit rate in each band is lowered by the share of fake words you ticked, then scaled up to an estimate between 0 and about 37,000 words, with a band-by-band breakdown and a shareable result card. It is the same yes/no checklist idea used in vocabulary research, kept short and for fun — not an exam or an official level.
Frequently Asked Questions
Q. How is my English vocabulary size estimated?
A. From your hit rate in each of five frequency bands (8 real words per band). Each band's hit rate, minus your fake-word rate, is multiplied by that band's size and summed, giving a result from 0 to about 37,000 words, rounded to the nearest 100.
Q. Why are there fake words in the test?
A. Eight invented words (such as "blorrent" or "snurtle") catch guessing. If you tick 2 of the 8, every band's hit rate is lowered by 25 percentage points, so over-claiming pulls your estimate down.
Q. How many English words does a native speaker know?
A. There is no single figure; it depends on how words are counted. Research estimates for adult native speakers range from roughly 15,000–20,000 word families to around 40,000 dictionary lemmas. Treat your result as a rough position on this test's own scale, not a direct comparison.
Q. Can I convert my result to a CEFR level or exam score?
A. No. The test has no conversion table for CEFR, TOEIC, IELTS or other exams. It is a quick self-check of recognition vocabulary.