How it works
One word, testedfrom every angle.
Recognising a word on a flashcard is not the same as knowing it. LexFlexer puts each word through spelling tests, forward and reverse definition matching, and timed word games — so that what sticks is real understanding, not just a vague sense of familiarity.
ubiquitous
Type the word from audio
kaleidoscope
Pick the correct meaning
verdant
Name the word from its meaning
labyrinth
Solve clues from your lists
crescendo
Resurface at the right moment
iridescent
Speed rounds from your word lists
Adaptive spacing
The system tracks what you know and what you don't. Weak words appear more often, strong words fade to the background — but never disappear entirely.
Every surface covered
Spell it, define it, match it forwards and backwards, and test against different word forms — comparatives, superlatives, past tenses, and more.
No shortcut to a right answer
Every word has multiple definitions. You can't just memorise one phrase and move on — you have to actually understand what the word means.
Games
Puzzles built fromthe words you're learning.
Every game is generated from your active word lists — not a generic database. If you're working on a set of words for a spelling test, those are the words that appear in your crossword that evening. Clues are drawn from different definitions each time, so repetition never feels repetitive.
Crossword Puzzle
Definitions from your word list become clues. Solve the grid to reinforce spelling and meaning at the same time.
Word Match
Drag words onto their definitions against the clock. Distractors and speed bonuses make every round different.
Word Search
Find hidden vocabulary words in a grid of letters. Definitions are your only clues — no word bank.
Word Flip
Flip tiles to match words with their synonyms and antonyms. Memory meets vocabulary in a timed challenge.
Quote Fill
Fill in the missing word from real quotes and example sentences. Context is the only hint you get.
More coming
We're building new game modes all the time. Your word lists power every one of them.
Books
Learn vocabularythrough stories.
Words stick when they live inside a story. Our book mode lets you read real chapters, hear them narrated, and then answer comprehension questions that test whether the meaning landed — not just whether you memorised a definition.
Read chapter by chapter
Each book is split into chapters with excerpts you read at your own pace. A distraction-free reader with adjustable fonts, themes, and text width.
Listen along
Every chapter has narrated audio. Read and listen at the same time, or just listen — playback speed adjusts to suit you.
Comprehension questions
After reading, answer questions drawn from the chapter. The system tracks which chapters you've mastered and which need another pass.
Vocabulary in context
Words from the chapter feed into your spelling and definition tests. You learn them from the story first, then lock them in through repetition.
Depth
Every word hasa backstory.
A definition tells you what a word means. A quote shows you how it lives. An etymology explains why it exists at all. LexFlexer gives you all three — because the more connections your brain makes to a word, the harder it is to forget.
Rich definitions
Multiple senses per word, not just one. Understand the full range of how a word is used.
10,000+ quotes from real sources
Words in context — drawn from journalism, fiction, speeches, and everyday language.
Etymologies that stick
See where a word came from. A Latin root or a borrowed French phrase turns an abstract definition into something you can picture.
Content
Start with ours. Build your own.
Not everyone starts in the same place. Some learners need primary-level colour words, others want obscure adjectives that would stump a crossword editor. We ship curated lists for both extremes and everything in between — or you can create exactly the list you need.
Curated lists
Organised by age, difficulty, and topic. Pick a list and start learning in under a minute — no setup required.
Your own lists
Add exactly the words you care about. Ideal for school homework lists, exam prep, or a personal challenge you've set yourself.
Who it's for
Different goals. Same tool.
Parents & young learners
Build a running list of every word your child is given at school — instead of learning ten words for Friday's test and forgetting them by Monday. New words layer on top of old ones, and supervised mode keeps younger children on track.
Spelling bee competitors
40,000+ words, each with audio pronunciation, multiple definitions, etymologies, synonyms, and antonyms. Build lists pitched at exactly the right difficulty and work through them systematically — the way serious competitors prepare.
Word lovers
Not training for anything — just curious. We surface a new word every day, share stories behind unusual terms on social media, and send a weekly digest by email. Come for one word, stay because you can't stop looking up the next.
Adults sharpening their edge
Our database runs from everyday vocabulary to words that would make a Countdown champion pause. If you've ever reached for the right word in a meeting and settled for a weaker one, this is how you stop doing that.
English as a second language
Clear definitions, native-speaker audio, and real examples for every word. We're building dedicated ESL features — including full audio sentences to practise listening comprehension — so the platform keeps getting more useful as your English improves.