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Vocabulary Age
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Vocabulary Age Test
20 words. 4 definitions each — all plausible. Choose the correct one. Words escalate from A2 to C2.
A2
B1
B2
C1
C2
~3 minutes · Options shuffle every time
01 /How to Play
- Words will appear on screen — some real, some invented.
- Indicate whether each word is a real English word (YES) or not (NO).
- You will also be asked to identify definitions for some words.
- Answer as fast as you can — hesitation may indicate word unfamiliarity.
- Your vocabulary size estimate and vocabulary age are calculated from your performance.
02 /The Science
Vocabulary size in adults ranges from approximately 20,000 to 100,000+ word families, with the average educated adult knowing around 40,000-60,000 words. The Vocabulary Levels Test (Nation, 1990) and the Vocabulary Size Test (Nation & Beglar, 2007) are foundational research instruments. Vocabulary is highly correlated with crystallized intelligence (Gc) and continues growing throughout adulthood, unlike most other cognitive abilities. It is the single strongest predictor of academic success and is highly valued in high-income professional contexts, driving premium advertising CPM rates.
Population Distribution
Based on population research data
03 /Pro Tips
- Don't guess randomly on invented words — false positive errors reduce your score.
- If a word looks familiar, it probably is — trust lexical familiarity signals.
- Vocabulary grows with reading — breadth of reading material matters more than volume.
- Technical vocabulary in your professional domain inflates scores in that register.
- Vocabulary age continues to grow throughout life — unlike most cognitive metrics.
Note: This test is designed for entertainment and self-reflection purposes only. Results are based on self-report and are not a substitute for professional psychological evaluation, diagnosis, or treatment. If you have concerns about your mental health, please consult a qualified professional.