Power Thesaurus - Power Thesaurus is a fast, comprehensive and easy-to-follow online thesaurus for writers...

Reji - Improve your vocabulary hassle-free 📚

Writefull Thesaurus - A Google Docs add-on that uses AI to give you synonyms

Wordd - Quickly look up vocabulary, abbreviations, acronyms, slang

Wordprobe - A thesaurus and translate app for Mac & iOS.

Duolingo - Duolingo is a free language learning app for iOS, Windows and Android devices. The app makes learning a new language fun by breaking learning into small lessons where you can earn points and move up through the levels. Read more about Duolingo.