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Best Synonym Dictionary Definitions Terms Apps

181+ iOS apps curated and reviewed

4.4 avg rating
19 free apps
Updated June 2026

The best synonym dictionary definitions terms apps on iPhone average 4.4★ across 181+ titles — we've ranked them by what real users actually keep on their phones. Updated June 2026.

Top Picks for Synonym Dictionary Definitions Terms

Power Thesaurus#1

Power Thesaurus by Radyushin Pty Ltd

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

Discover a powerful, community-driven online platform offering a vast collection of synonyms, antonyms, and word associations for writers and students. Enhance your writing experience with user-friendly tools, personalized search results, and ad-free option. Join the community, contribute new terms, and access account features for an improved writing journey.

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
Dictionary.com: English Words#2

Dictionary.com: English Words by Curiosity Media, Inc.

Dictionary, Thesaurus, Vocab
Strong Contender
🔍 Reference
4.8😐(328K ratings)
FreeAdsIn-App Purchases
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Access the ultimate English language learning app packed with quizzes, games, and over 2 million definitions and synonyms. Enhance your vocabulary with word puzzles and daily challenges, enjoy dark mode, offline access, voice search, and more. Improve your English skills effortlessly!

What We Love

  • 🚀 Robust dictionary and thesaurus
  • 🤓 Helpful resources like blogs and articles
  • 💡 Useful word games and puzzles
  • 👍 Easy to use and navigate

Room to Improve

  • 🐛 Inconsistent search results and missing definitions
  • 💸 Aggressive ads even after paid upgrades
  • 🤯 Frequent crashes and performance issues
Dictionary.#3

Dictionary. by Farlex, Inc.

by TheFreeDictionary.com
Worth Considering
🔍 Reference
4.8😊(14K ratings)
FreeAdsIn-App Purchases
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Discover a comprehensive Dictionary and Thesaurus app with a Word of the Day feature, offline access, and resources from top sources. Access millions of definitions, synonyms, translations, and more for a versatile language tool.

What We Love

  • 🚀 Comprehensive and detailed definitions
  • 👍 Helpful thesaurus and translation features
  • 🎮 Fun word games and activities
  • 📚 Vast amount of information beyond just definitions

Room to Improve

  • 🔍 Cluttered interface with too many ads
  • 🐛 Occasional crashes and bugs
  • 🔍 Difficulty finding specific settings or features

More Synonym Dictionary Definitions Terms apps to explore

4
Merriam-Webster Dictionary
Merriam-Webster Dictionary
Merriam-Webster Dictionary
by Merriam-Webster, Inc.
Free

Access a premier iOS app for English language reference, education, and vocabulary building, with new word games and quizzes for learning. Features universal access, offline capabilities, voice search, daily word learning, thesaurus, example sentences, and pronunciations by real speakers. Enjoy features like favorite word syncing and Apple Watch integration. Subscribe to remove ads and access extra resources. Manage your subscription easily. Terms of Use: [Link to Terms of Use].

🔍 Reference
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5
Synonym Dictionary Definitions Terms
Synonym Dictionary Definitions Terms
Synonym Dictionary Definitions Terms
by Santosh Mishra
Free

Discover a comprehensive tool that helps you explore synonyms and meanings of words, making it easier to enhance your vocabulary and communicate efficiently. Download this free app to access a vast encyclopedia of words, search for difficult terms, and even share your findings on social media.

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6
Terminology
Terminology
Terminology
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Explore a comprehensive terminology dictionary with extensive definitions, synonyms, and related terms. Enhance your understanding of various concepts and expand your vocabulary effortlessly. Start discovering today!

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7
English Dictionary *
English Dictionary *
English Dictionary *
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Access a comprehensive offline English dictionary with over 4000 essential words at your fingertips. Enhance your vocabulary, improve language skills, and understand definitions without needing an internet connection.

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8
WordWeb Dictionary
WordWeb Dictionary
WordWeb Dictionary
Offline ad-free dictionary
Free

Discover a comprehensive offline dictionary and thesaurus with fast search, spelling suggestions, definitions, synonyms, and more. Enjoy ad-free browsing, usage examples, and unique search features without the need for an internet connection. Explore WordWeb Dictionary for a seamless word lookup experience.

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9
Dictionary and Thesaurus Pro
Dictionary and Thesaurus Pro
Dictionary and Thesaurus Pro
by TheFreeDictionary.com
$9.99

Access the premium ad-free Dictionary and Thesaurus Pro app by TheFreeDictionary.com for comprehensive offline dictionary and thesaurus content in multiple languages, including offline translations.

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10
Vocabulary - Learn words daily
Vocabulary - Learn words daily
Vocabulary - Learn words daily
Erweitern Sie Ihren Wortschatz
Free

Improve your vocabulary effortlessly with an app designed to enhance word power. Customize difficulty levels, select categories, and reach linguistic goals all at your own pace. Start expanding your English language skills now!

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11
Dictionary - English
Dictionary - English
Dictionary - English
English Dictionary Offline
Free

This free offline English dictionary and thesaurus provides instant access to meanings, synonyms, antonyms, and usage examples of over 147,000 words, helping you enhance your vocabulary and writing skills. Get the dictionary now and learn new words, definitions, and spellings on-the-go!

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12
Persian Dictionary - ديكشنري
Persian Dictionary - ديكشنري
Persian Dictionary - ديكشنري
ديكشنري و مترجم فارسي انگلیسي
Free

A comprehensive offline Persian-English Dictionary app featuring over 400,000 words, audio pronunciation, vocabulary games, idioms, and daily English listening lessons. Ideal for studying, working, or traveling, offering advanced search functions and the ability to create personalized vocabulary lists. Discover a wealth of linguistic resources at your fingertips!

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13
FreeSaurus - The Free Thesaurus!
FreeSaurus - The Free Thesaurus!
FreeSaurus - The Free Thesaurus!
by Weeswares Pte Ltd
Free

Find synonyms and related words easily with a simple and focused thesaurus application. Get quick word meanings and expand your vocabulary effortlessly.

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14
Kurdish Dictionary - Dict Box
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English Kurdish Translation
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A highly efficient English to Kurdish dictionary app with a vast vocabulary. Ideal for users seeking quick translations without any hassle. Download now for instant access to comprehensive language support.

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15
NAVER Dictionary
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by NAVER Corp.
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Access a comprehensive and free dictionary app with 70 dictionaries, 30M headwords, pronunciation evaluation, quizzes, and 1M English pronunciations. Explore English-English, Thesaurus, Korean, and bilingual dictionaries. Visit the NAVER Dictionary Official Blog for more details and reach out to NAVER English Dictionary Customer Center for assistance.

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16
Dictionary Linguee
Dictionary Linguee
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German, French, Spanish, more
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Discover a revolutionary dictionary app offering fast and reliable translations in multiple languages, including French, Spanish, and German. Access over one billion translations, editorial dictionaries, offline mode, example sentences, and pronunciation guides for seamless language learning. Try it now for quick and accurate translations on the go.

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17
Advanced Dictionary&Thesaurus
Advanced Dictionary&Thesaurus
Advanced Dictionary&Thesaurus
English dictionary with Audio
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An innovative language tool designed to enhance vocabulary skills through interactive word meanings, synonyms, antonyms, and example sentences. Expand your linguistic knowledge effortlessly!

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18
Vietnamese Dictionary Dict Box
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Vietnamese Dictionary Dict Box
Engish Vietnamese Translator
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Access an all-in-one Vietnamese-English dictionary and translator app that offers offline access, effortless text translation, word suggestions, and more. Enhance your language learning with features like text-to-speech pronunciation, picture dictionary, and word reminders. Upgrade to Premium for an ad-free experience and additional benefits.

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19
WordPal - Vocabulary Builder
WordPal - Vocabulary Builder
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Learn new words: expand vocab
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Improve your English vocabulary rapidly with an intuitive app that uses spaced repetition and engaging exercises to help you learn new words efficiently. Access definitions, examples, and track your progress easily for free, with the option to upgrade for more features like games and additional word sets.

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20
LexicEN Lite English
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LexicEN Lite English
Offline Dictionary & Thesaurus
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LexicEN Lite English is an offline dictionary app designed to offer fast and easy search functionality for definitions, synonyms, and translations in multiple languages. Download now to enhance your vocabulary on the go!

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