What is Thesaurus?

Look up synonyms, antonyms, and related words for any English word. Uses a built-in dataset, so results are instant and no internet connection is needed.

The dataset covers more than 225 high-frequency English words across adjectives, verbs, and common nouns. Each entry groups its synonyms by strength (most similar, common, broader), tags the part of speech, and lists antonyms when they apply. Type to filter the suggestions, click any chip to drill into that word, filter by length when you need a shorter or longer pick, and copy one word or the whole set with a single tap. Everything runs locally and never tracks your search.

How to use

1. Type a word into the search field — results appear instantly as you type.
2. Browse the list of synonyms grouped by meaning, and antonyms when available.
3. Click any synonym to look it up and find more related words.

When to use

• Polishing an essay or article when a word keeps repeating and starts to sound flat.
• Sharpening UX copy or marketing taglines where one stronger adjective changes the meaning.
• Studying for SAT, IELTS, or TOEFL by skimming antonym pairs of common adjectives.

Result

A student writing an essay types 'happy' and finds synonyms like 'joyful', 'elated', 'content', 'cheerful', and 'delighted', plus antonyms like 'sad', 'miserable', and 'gloomy'.

FAQ

How many words are in the database?

More than 225 high-frequency English words, spanning adjectives, verbs, and common nouns. Each entry has its synonyms grouped by similarity strength (most similar, common, broader) plus antonyms when they exist. The set covers everyday writing well; for rare academic vocabulary or specialist jargon, a dedicated dictionary like Wordnik still goes deeper.

Why don't I see results for technical terms like 'algorithm' or 'mitochondria'?

Specialist scientific or industry terms — algorithm, mitochondria, photolithography — are intentionally out of scope. The dataset focuses on words people swap most often in everyday writing: descriptive adjectives, common verbs like learn or build, and frequent nouns like home or family. For technical synonyms, a domain-specific dictionary stays a better fit.

Can I look up words in other languages?

Not in this tool — the database is English-only. For other languages, you'd need a language-specific resource because synonym networks don't translate one-to-one. We may add additional languages later if there's demand.

What's the difference between synonyms and 'related words'?

Synonyms are interchangeable in most contexts. Related words share the same theme but mean something different — a thesaurus for 'happy' lists 'joyful' as a synonym and 'celebration' as related. This tool surfaces both so you can adjust the connotation.

Is my search query stored or sent anywhere?

Your search itself never leaves your device — there is no server lookup and no network log. The only thing saved between sessions is a list of your last five looked-up words, stored on your device so you can jump back to them; the recent bar has a clear button that wipes it instantly. Nothing is ever sent off-device.

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