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Thesaurus Rex by

Find just the right word with an app that lets you refine, sort, and filter your options.

Thesaurus Rex by Dictionary

Thesaurus Rex by

by, LLC
Get your synonyms and more
Thesaurus Rex by
Thesaurus Rex by
Removed from the App Store

Thesaurus Rex by offers over 550,000 new and modern synonyms, antonyms, and definitions. Refine, filter, sort, save, and listen to words, all with offline access so you can use it if you write on the go.

Get your synonyms and more

What is it about?

No matter what your mission is, be it a term paper, song lyrics, or chapter in a book, Thesaurus Rex by is a terrific word-finding option. With four filters, you can refine and sort both synonyms and antonyms. The relevance feature, complexity dial, and length option help you to find the perfect word for your project. And, the audio pronunciation and word origin with history features are great for learning new words.

For those who...

  • Need a thesaurus that is available offline
  • Want a thesaurus with extensive features

Not for those who...

  • Prefer your current thesaurus app
  • Would rather use a free thesaurus option

Why we love it

Thesaurus Rex by provides a large selection of synonyms, antonyms, filtering, audio pronunciation, and so much more. For a thesaurus with extension features, this is the one you want.

App Screenshots

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App Details

Reference Education
Last updated
November 4, 2013
Release date
March 11, 2013
More info

Thesaurus Rex by Dictionary is $2.99 but there are more add-ons

  • $1.99

    Rhymes & Syllables upgrade

  • $1.99

    Examples & Tips upgrade

App Store Description

Thesaurus Rex by revolutionizes the thesaurus for the first time in 160 years. We’ve added modern content and synonyms for new words such as epiphany & stakeholder, plus 30,000 more new entries. WORKS OFFLINE.

Save time with proprietary features: Sort synonyms with filters such as Relevance, Complexity, Length and more. Create personalized lists of your favorite synonyms. Quickly refine any style of writing & find the perfect words.

TIP: Student? Find the perfect word and synonyms fast with our “best match” feature. Writer? Refine and sort your synonyms by Length, Complexity, Relevance and more. Poet or songwriter? Rhymes & Syllables is only available here and will help any lyricist.


* The only advanced English thesaurus with modern content, with over 550,000 new and modern synonyms, antonyms and definitions from and
* Refine & sort your synonyms & antonyms across 4 different filters
* Get recommendations for the “best match” words with Relevance feature
* Find a more difficult or simpler synonym with our Complexity dial
* Shorten or lengthen your synonyms with our Length feature
* Save personalized shortlists of all your favorite synonyms
* Offline access-no Internet connection needed for most content
* Audio pronunciation
* Learn new words in context with Word Origin & History
* Improve your writing with Examples & Tips (available via in-app purchase)
* Rhyme and sort by exact syllable count with Rhymes & Syllables (available via in-app purchase)