Vocabulary · Rating · Mastery
Your vocabulary has a rating.
Most people don't know theirs.
Lemmerly is a self-calibrating vocabulary engine modelled on chess ELO. Every word you encounter adjusts your rating in real time — revealing not just what you know, but precisely how well you know it.
lemma — the base form of a word. run is the lemma of running, ran, runs.
Lemmerly rates your command of the lemma — the word itself, in all its meanings.
Lemmerly rates your command of the lemma — the word itself, in all its meanings.
100,000+Words in the Engine
800 – 2,400ELO Rating Range
8Title Levels
GRE · CAT · GMATExam Packs
How It Works
01
Play a Session
Ten words, four choices each. The engine selects words matched to your current level — not too easy, never impossible.
02
Your Rating Moves
Answer correctly and your ELO rises. Stumble on a word and it falls. Every answer refines the model of your vocabulary.
03
Watch Yourself Climb
Track your ELO curve, earn titles from Initiate to Lex Archmaster, and see exactly which exam-level words you've mastered.
What a Session Looks Like
Word → Definition
tendentious
adjective
A.expressing a particular point of view; biased
B.inclined toward careful, methodical reasoning
C.showing an excessive fondness for established tradition
D.marked by a reluctance to commit to any position
The correct answer is highlighted. Your ELO adjusts after every word.
Eight Titles. One Ladder.
Your rating earns you a title — a permanent marker of where your vocabulary stands. Where do you rank?
🌟Lex Archmaster2300+
👑Lex GM2000
✒️Lex Master1700
📚Lex Expert1500
🪶Lex Adept1300
📜Lex Scholar1100
✏️Word Apprentice900
📖Initiate800
Built For
🎓
GRE & GMAT Aspirants
Drill the exact words that appear on graduate admissions tests. Track your readiness with a live rating.
📈
CAT & MBA Prep
The verbal section rewards precision. Lemmerly trains you to distinguish near-synonyms — the skill that separates scores.
📖
Lifelong Word Lovers
For those who read widely and want to know: how rich is my vocabulary, really? Now there's a number for that.
29,875 Books. Rated by Vocabulary.
Ulysses is harder than Pride and Prejudice.
We can prove it.
Every book on Project Gutenberg — rated using the same ELO system that rates your vocabulary. Find out which classics match your level. From Dubliners to Ulysses, from Jane Eyre to Middlemarch.
Ulysses
James Joyce
1649 ELO
Middlemarch
George Eliot
1622 ELO
War and Peace
Leo Tolstoy
1617 ELO
Pride and Prejudice
Jane Austen
1582 ELO
From the Blog
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What's your ELO?
Three sessions a day. No credit card needed. Upgrade for 10 sessions/day and exam word packs.
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