# Moby Thesaurus - extended — comprehensive thesaurus

> comprehensive thesaurus (iPhone/iPad app by Thuy Duong.)

- Source: https://appshunter.io/ios/app/moby-thesaurus-extended/id1531115545 (this page in markdown: same URL + `.md`)
- Developer: [Thuy Duong](https://appshunter.io/developer/1233559314)
- Category: Reference, Education
- Price: $1.99
- Age rating: 4+
- Requires: iOS 11.0 · 113 MB
- Languages: American English
- Released: 2020-09-10
- Data updated: 2026-08-29
- User reviews in markdown: https://appshunter.io/ios/app/moby-thesaurus-extended/id1531115545/reviews.md

## What is Moby Thesaurus?

This app provides Moby thesaurus, extended version.

The thesaurus contains 30,260 root words, with 2,520,264 synonyms and related terms – an average of 83.3 per root word. Each line consists of a list of comma-separated values, with the first term being the root word, and all following words being related terms.

The thesaurus is considered the largest thesaurus of the English language.

● Thesaurus
- 30260 entries including words, phrasal verbs, phrases, etc.
- 2,520,264 synonyms and related terms
- Built-in dictionary: long-press a word and tap "Define"
- Translation: long-press a word and tap "translate"
- Pronunciation: long-press a word and tap "pronounce"

● Lists
- Create a list
- Add entry into a list
- Review entries in a list using flashcards

● Study
- Learn 30 entries daily
- Multiple choice quizzes 
- Flashcards

● Basic features:
- Search feature: search by entry or by synonyms
- Voice search
- Bookmark feature
- Built-in dictionary
- Share an entry
- Copy an entry


## Version history (last 2 releases)

### 2.0 — 2024-02-05

We have improved the app's user interface and performance in this version.

### 1.0 — 2020-09-10

No release notes.

## Apps similar to Moby Thesaurus

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Vocabulary for IELTS, TOEFL](https://appshunter.io/ios/app/vocabulary-for-ielts-toefl/id1353633744) | — | $2.99 | Reference |
| [Common English Idioms](https://appshunter.io/ios/app/common-english-idioms/id1222281864) | — | $0.99 | Reference |
| [Synonym Antonym Audiobook](https://appshunter.io/ios/app/synonym-antonym-audiobook/id1159522496) | — | $0.99 | Reference |
| [English Verb Preposition](https://appshunter.io/ios/app/english-verb-preposition/id1220749741) | — | $1.99 | Reference |
| [English Synonyms Explained](https://appshunter.io/ios/app/english-synonyms-explained/id1445549641) | — | $1.99 | Reference |
| [Latin-derived Synonyms](https://appshunter.io/ios/app/latin-derived-synonyms/id1137365779) | — | $0.99 | Reference |

## More apps by Thuy Duong

- [Mastering Idioms for TOEFL®](https://appshunter.io/ios/app/mastering-idioms-for-toefl/id1018112927)
- [GRE word list master](https://appshunter.io/ios/app/gre-word-list-master/id1105175620)
- [Word List for TOEFL® Test](https://appshunter.io/ios/app/word-list-for-toefl-test/id1109807336)
- [GRE® High frequency wordlist](https://appshunter.io/ios/app/gre-high-frequency-wordlist/id1121530470)
- [2nd edition of Black's Law](https://appshunter.io/ios/app/2nd-edition-of-blacks-law/id1131909559)
- [English Origin Dictionary](https://appshunter.io/ios/app/english-origin-dictionary/id1193489316)

All apps by Thuy Duong: https://appshunter.io/developer/1233559314

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-29.*