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Best Synonym Dictionary Definitions Terms Apps

247+ iOS apps curated and reviewed

3.9 avg rating
18 free apps
Updated September 2026

The best synonym dictionary definitions terms apps on iPhone average 3.9★ across 247+ titles — we've ranked them by what real users actually keep on their phones. Updated September 2026.

Compare top Synonym Dictionary Definitions Terms Apps (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Dictionary.com: English WordsDictionary.com: English WordsFree4.8★ (328K)YesNoOct 2026
2Synonym Dictionary Definitions TermsSynonym Dictionary Definitions TermsFree1.7★ (6)NoNoMay 2026
3Merriam-Webster DictionaryMerriam-Webster DictionaryFree4.8★ (328K)YesYesOct 2026
4Dictionary.Dictionary.Free4.8★ (15K)YesYesOct 2026
5Oxford Dictionary & ThesaurusOxford Dictionary & ThesaurusFree4.6★ (29K)NoYesOct 2026
6Power ThesaurusPower ThesaurusFree4.8★ (3K)YesYesSep 2026
7English Dictionary - Offline & FREEEnglish Dictionary - Offline & FREEFree—NoNoMay 2026
8Etymonline English DictionaryEtymonline English DictionaryFree4.9★ (12K)YesYesSep 2026

Top Picks for Synonym Dictionary Definitions Terms

Dictionary.com: English Words#1

Dictionary.com: English Words by Curiosity Media

Dictionary, Thesaurus, Vocab
Editor's Choice
🔍 Reference
4.8😐(328K ratings)
FreeAdsIn-App Purchases
Dictionary.com: English Words screenshot 1
Dictionary.com: English Words screenshot 2
Dictionary.com: English Words screenshot 3
Dictionary.com: English Words screenshot 4
Dictionary.com: English Words screenshot 5

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.

What We Love

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

Room to Improve

  • 🐛 Inconsistent search results and missing definitions
  • 💸 Aggressive ads even after paid upgrades
  • 🤯 Frequent crashes and performance issues
  • 🤔 Confusing layout changes and UI issues
  • 🤷‍♀️ Paid features not always working as expected
Merriam-Webster Dictionary#3

Merriam-Webster Dictionary by Merriam-Webster, Inc.

Worth Considering
🔍 Reference
4.8😊(328K 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
  • 👍 Word of the day feature
  • 👍 Fun word games

Room to Improve

  • 🐛 Ads can be intrusive
  • 🐛 Difficulty closing ads
  • 🐛 Repetitive game questions
  • 🐛 Missing words in dictionary
  • 🐛 Unreasonable level progression in games

More Synonym Dictionary Definitions Terms apps to explore

FAQ about Synonym Dictionary Definitions Terms

What are the best synonym dictionary definitions terms apps for iPhone?
Dictionary.com: English Words tops our synonym dictionary definitions terms apps ranking as of September 2026, with a 4.8-star average from 328K App Store ratings, and it's free to download.
Yes — 18 of the top synonym dictionary definitions terms apps we rank are free to download, including Dictionary.com: English Words and Synonym Dictionary Definitions Terms.
Dictionary.com: English Words shows ads and has no in-app purchases, according to its App Store listing as of September 2026.
We track 247+ synonym dictionary definitions terms apps on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.