Power Thesaurus - Power Thesaurus is a fast, comprehensive and easy-to-follow online thesaurus for writers...
Writefull Thesaurus - A Google Docs add-on that uses AI to give you synonyms
Reverse Dictionary - Describe a concept and get back a list of words
Classic Thesaurus - crowdsourced thesaurus
FoxType Thesaurus - Visualize similar words for _____
Wordprobe - A thesaurus and translate app for Mac & iOS.