American Heritage Thesaurus

American Heritage Thesaurus

By MobiSystems, Inc.

  • Category: Reference
  • Release Date: 2016-07-11
  • Current Version: 10.0.5
  • Adult Rating: 4+
  • File Size: 34.10 MB
  • Developer: MobiSystems, Inc.
  • Compatibility: Requires iOS 9.0 or later.
Score: 3.5
From 74 Ratings


Exhaustively researched and thoroughly revised, the Fifth Edition of THE AMERICAN HERITAGE® DICTIONARY OF THE ENGLISH LANGUAGE contains 10,000 new words and phrases, over 4,000 dazzling new full-color images, and authoritative, up-to-date guidance on usage. Thousands of definitions have been revised in rapidly changing fields such as astronomy and biology, geographical entries and maps have been completely updated, and the dictionary’s signature feature notes on word history, synonymy, and language variation have all been enhanced and improved. Word meanings are made easier to understand with thousands of new quotations from classic and contemporary writers. Etymologies explaining word origins and development have been newly created or revised to reflect the very latest scholarship. Many words are traced back to their roots in prehistory through two unique appendixes showing word roots in ancient Indo-European and Semitic. THE AMERICAN HERITAGE® ROGET'S THESAURUS offers an intelligent and sensible guide to synonym selection. It provides a wide range of synonyms, ranging from mainstream vocabulary to the colorful alternatives that make English such a rich and versatile language. Thousands of slang, informal, and regional words broaden the coverage even further. Each synonym list focuses on a clear definition that quickly orients the user to the relevant meaning. Also includes advanced search and language tools that have become the staple of quality language apps from MobiSystems. SEARCH TOOLS – effortlessly find words using a clear, functional, and easy-to-use interface. The integrated search tools activate automatically the moment you start typing: * Search autocomplete helps find words quickly by displaying predictions as you type * Keyword lookup allows you to search within compound words and phrases * An automatic ‘Fuzzy filter’ to correct word spelling, as well as ‘Wild card’ ('*' or '?') to replace a letter or entire parts of a word * Camera search automatically searches for words in the camera viewfinder and displays results LEARNING TOOLS – engaging features that help you further enhance your vocabulary: * ‘Favorites’ feature to create custom folders with lists of words from the extensive library * ‘Recent’ list to help you easily review looked-up words * ‘Word of the day’ section to help expand your vocabulary every day CONTACT US: If you have any questions, feedback or suggestions please contact us directly at



  • Bring back the old tools

    By Dk Danes
    Missing letters fillers, and word unscrambler please. This was in the old AHD apps. Also, keep the setting when Thesaurus is set as default tool. Right now it always revert to dictionary. Provide option to open search upon opening app. Add letter index to easily navigate word entries in the list.
  • Eclectic

    By roughouse
    American Heritage provides an up to date experience for word searchers, unlike the staid attitudes of other dictionaries.
  • Word of day not interesting

    By Mekindig
    I don’t find word of day helpful in building my vocabulary
  • The Usage Panel Makes This Dictionary Outstanding.

    By Pefupartner
    You learn more than definitions; you get insight into how words are used and applied.
  • AD

    By Dantesvino
    Absolutely the best!
  • Again?!?!!

    By Jfmangels
    They keep making me buy this program. Probably I never will again. This is maybe the fourth or fifth time. Not even a discount for owning a previous version. And they still keep asking me to rate the program on the opening page - just moved from three to two stars for this.
  • Decent but not complete

    By SuperheroSmith
    Your word of the day option, which doesn’t always fire daily, continues to display the same word of the day: jig (2)
  • Annoying pop-up

    By WASeattle
    The incessant requests for a rating are highly annoying on a paid app.
  • Falls short if expectations

    By albanyskye
    Had great expectations for this app, however, I was let down. Some worlds are missing origin explanations. Pronunciation icon does not work. I have compared entry descriptions to a free, online program and the free, online program is more complete. I would look for another app to spend money on next time. Disappointing.
  • Poor support

    By mikegarabaldi
    I have bought this program three times. When it works it’s great the first time I upgraded my phone program stopped working never got it working again. The second time I bought version five been working good. I had to get a new iPhone because my phone stopped working. Now the Dictionary doesn’t work again. Contacted support, got one reply, still not working, sent email again, no reply. Program still not working. Wouldn’t be so bad if it had an a costed me $25 each time.