Install dict-moby-thesaurus by entering the following commands in the terminal:
sudo apt update sudo apt install dict-moby-thesaurus
Largest and most comprehensive thesaurus
Moby Thesaurus is the largest and most comprehensive thesaurus data source in English available for commercial use. This second edition has been thoroughly revised adding more than 5,000 root words (to total more than 30,000) with an additional _million_ synonyms and related terms (to total more than 2.5 _million_ synonyms and related terms). . This is formatted for use by the dictionary server in the dictd package.