Best Free Thesaurus Apps

189+ iOS apps curated and reviewed

4.5 avg rating
17 free apps
Updated May 2026

If you already know Power Thesaurus, this is the deeper bench. 189+ free thesaurus apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of May 2026.

Top Picks for Free Thesaurus

Power Thesaurus#1

Power Thesaurus by Radyushin Pty Ltd

Comprehensive. Fast. Reliable.
Editor's Choice
🔍 Reference
4.8😊(2.9K ratings)
FreeAdsIn-App Purchases
Power Thesaurus screenshot 1
Power Thesaurus screenshot 2
Power Thesaurus screenshot 3

Find accurate synonyms, antonyms, definitions, and related words with this comprehensive and fast thesaurus. Designed for writers, students, and professionals, it offers intuitive navigation and smart filters to help you express ideas clearly and confidently.

What We Love

  • ⭐ Invaluable tool for everyone
  • 🚀 Must have
  • ⭐ Superior
  • ⭐ Synonyms

Room to Improve

  • 🔌 Could be better
  • 🐛 Crashes
  • 🐛 Crashes the second you tried to open it
Thesaurus Free#2

Thesaurus Free by 大為 畢

Strong Contender
🔍 Reference
3.0(2 ratings)
Free
Thesaurus Free screenshot 1
Thesaurus Free screenshot 2
Thesaurus Free screenshot 3

An offline English thesaurus and dictionary offering over 270,000 definitions, synonyms, and antonyms. It includes example sentences, pronunciation, and a unique visual view to explore word connections. Access most content without an internet connection.

Merriam-Webster Dictionary#3

Merriam-Webster Dictionary by Merriam-Webster, Inc.

Worth Considering
🔍 Reference
4.8😊(320K ratings)
FreeAdsIn-App Purchases
#40in Reference
Merriam-Webster Dictionary screenshot 1
Merriam-Webster Dictionary screenshot 2
Merriam-Webster Dictionary screenshot 3
Merriam-Webster Dictionary screenshot 4

Access America's most respected dictionary, updated with new words and meanings. This app offers offline access, voice search, daily vocabulary challenges, and a thesaurus. It's designed for English language reference, education, and vocabulary enhancement.

What We Love

  • 🚀 Easy to use
  • 👍 Comprehensive definitions
  • 👍 Helpful thesaurus
  • 🚀 Offline access

Room to Improve

  • 🐛 Ads can be intrusive
  • 🐛 Difficulty closing ads
  • 🐛 Repetitive game questions

More Free Thesaurus apps to explore

4
Dictionary.com: English Words
Dictionary.com: English Words
Dictionary.com: English Words
Dictionary, Thesaurus, Vocab
Free

Access over 2 million trusted definitions and synonyms for English words. Enhance your vocabulary with daily new words, example sentences, and audio pronunciations. This app provides grammar tips and editorial content to deepen your understanding of the English language.

2 million+ definitions and synonymsWord of the DayExample sentences
🔍 Reference
(328K)
free with in-app purchases
5
Oxford Dictionary & Thesaurus
Oxford Dictionary & Thesaurus
Oxford Dictionary & Thesaurus
Thesaurus & Offline Vocabulary
Free

Access a vast collection of dictionaries and thesauruses with definitions, pronunciations, and etymology. Features include offline access, advanced search options, and personalized word lists. Ideal for students, professionals, and word enthusiasts.

15 Oxford DictionariesThesaurus integrationAudio pronunciations
🔍 Reference
(28K)
free with in-app purchases
6
Pocket Thesaurus
Pocket Thesaurus
Pocket Thesaurus
The Ultimate Offline Thesaurus
Free

Expand your vocabulary and master the English language with this offline thesaurus. Quickly find synonyms and antonyms, explore word definitions, and enhance your writing and communication skills. Features include daily word challenges and advanced search options.

Extensive offline access to 90,000+ wordsFast and efficient synonym/antonym searchWord of the Day/Week from GRE list
🔍 Reference
(380)
free with in-app purchases
7
Word Hippo
Word Hippo
Word Hippo
Thesaurus and Word Reference
Free

This app offers a comprehensive suite of word tools, including an advanced thesaurus for synonyms and antonyms, example sentences, rhyming words, and word type identification. It also features word finders for games, definitions, and translations into numerous languages.

Advanced thesaurus with synonyms and antonymsExample sentences for word usageRhyming word finder
🔍 Reference
(12K)
free with in-app purchases
8
Thesaurus dictionary- Wordloop
Thesaurus dictionary- Wordloop
Thesaurus dictionary- Wordloop
Synonyms power up vocabulary
Free

Enhance your writing by accessing a thesaurus directly from your keyboard. Select any word in any app to instantly see synonyms and related terms, helping you expand your vocabulary and refine your text. This ad-free tool offers a simple and effective way to improve your communication.

Keyboard thesaurus integrationInstant word suggestionsSynonym lookup in any app
🔍 Reference
(258)
free with in-app purchases
9
Grammarly: AI Keyboard & Notes
Grammarly: AI Keyboard & Notes
Grammarly: AI Keyboard & Notes
Chats, emails, work and study
Free

Enhance your writing across all apps with AI-powered suggestions for grammar, spelling, and clarity. Generate new versions of your text, detect tone, and improve conciseness. Also includes a document editor and Safari extension for comprehensive writing support.

Real-time grammar and spelling suggestionsAI-powered text rewritesTone detection and transformation
📊 Productivity
(218K)
freemium
10
Dictionary.
Dictionary.
Dictionary.
by TheFreeDictionary.com
Free

Access a comprehensive dictionary, thesaurus, and translation tool with millions of definitions and synonyms. Explore specialty dictionaries, learn new words daily, and play word games. This app offers offline access and integrates seamlessly with other applications.

Offline dictionary and thesaurusMillions of definitions and synonymsWord of the Day and Idiom of the Day
🔍 Reference
(14K)
free with in-app purchases
11
WordWeb Dictionary
WordWeb Dictionary
WordWeb Dictionary
Offline ad-free dictionary
Free

This app provides a comprehensive offline English dictionary and thesaurus with fast searching, spelling suggestions, definitions, and usage examples. It offers extensive word data and advanced search filters without requiring an internet connection.

Offline dictionary and thesaurusFast searchingSpelling suggestions
🔍 Reference
(85)
free
12
Advanced Dictionary&Thesaurus
Advanced Dictionary&Thesaurus
Advanced Dictionary&Thesaurus
English dictionary with Audio
Free

This comprehensive English dictionary and thesaurus offers precise definitions, synonyms, antonyms, and related words. It features intelligent search tools, offline audio, and customizable themes to enhance your language learning experience.

140,000+ definitionsSynonyms, antonyms, and related wordsOffline audio pronunciation
🔍 Reference
(4.3K)
free with in-app purchases
13
Word of the Day・Vocabulary
Word of the Day・Vocabulary
Word of the Day・Vocabulary
Vocab Builder & Word Games
Free

Enhance your vocabulary with daily words, engaging games, and personalized quizzes. This app offers expert-curated content and interactive challenges to make learning stick and improve your communication skills.

Daily word insights with definitions and examplesVocabulary assessment and personalized learning plansWord games like Hangman and Gaps
📚 Education
(38K)
free with in-app purchases
14
FreeSaurus - The Free Thesaurus!
FreeSaurus - The Free Thesaurus!
FreeSaurus - The Free Thesaurus!
by Weeswares Pte Ltd
Free

This is a straightforward thesaurus app that provides synonyms and antonyms for words. It focuses on simplicity and ease of use, offering related words alongside definitions. An internet connection is required for it to function.

Synonyms and antonymsRelated wordsSimple interface
🔍 Reference
(120)
free
15
Roget's II: New Thesaurus
Roget's II: New Thesaurus
Roget's II: New Thesaurus
Synonyms & Antonyms by UniDict
$4.99

Access a comprehensive English thesaurus with millions of synonyms and related terms. Enhance your vocabulary and express yourself more effectively with this powerful reference tool, featuring advanced search and offline capabilities.

Full text of Roget's II: The New ThesaurusMillions of synonyms and related termsReal-time progressive look-up
🔍 Reference
(332)
paid
16
Dict-o-saurus Rex
Dict-o-saurus Rex
Dict-o-saurus Rex
A Dictionary and Thesaurus app
Free

Discover the meanings and synonyms of hundreds of thousands of words with this comprehensive dictionary and thesaurus. It offers autocomplete suggestions, a word history, and the ability to save favorites. Explore words further with quick links to external online dictionaries.

Search definitions and synonymsAutocomplete suggestionsAutomatic word history
🔍 Reference
(27)
free
17
Thesaurus Synonyms AI Keyboard
Thesaurus Synonyms AI Keyboard
Thesaurus Synonyms AI Keyboard
Power & Vocabulary & Grammar
Free

This keyboard extension offers a powerful thesaurus and AI writing assistant to help you find synonyms, rephrase sentences, and enhance your vocabulary across all apps. Elevate your writing with intelligent suggestions for richer, more impactful communication.

AI-powered synonym suggestionsSentence and phrase rephrasingSeamless keyboard integration
📊 Productivity
(13)
free with in-app purchases
18
Merriam-Webster Dictionary+
Merriam-Webster Dictionary+
Merriam-Webster Dictionary+
Premium Ad-free Dictionary
$9.99

Access America's leading dictionary with over 15,000 extra entries for people and places. Enjoy offline access, voice search, and daily vocabulary builders. This app offers expert word guidance with a thesaurus and example sentences.

Ad-free experience15,000+ premium entriesOffline dictionary access
🔍 Reference
(22K)
freemium
19
Interactive Thesaurus
Interactive Thesaurus
Interactive Thesaurus
Visual Dictionary & Thesaurus
$2.99

Explore word meanings and relationships with this smart English thesaurus. It helps you find suitable words, expand your vocabulary, and improve grammar through an intuitive interface with semantic relations and color-coded parts of speech. Offline access and sharing options are included.

200,000+ English words and definitionsVisual semantic relations between wordsColor coding for parts of speech
🔍 Reference
(747)
paid
20
LexicEN Lite English
LexicEN Lite English
LexicEN Lite English
Offline Dictionary & Thesaurus
Free

This offline dictionary and thesaurus provides quick access to over 150,000 words with definitions, pronunciations, and example sentences. Easily look up words, manage favorites, and view search history without an internet connection.

Offline search150,000+ wordsDefinitions, pronunciation, examples
🔍 Reference
(1.2K)
free with in-app purchases

Related searches