I Sinonimi e contrari Treccani 1.1.2 Paid

Characteristics
* about 60 000 entries
* subdivision of entries into other meanings
* articulation of synonyms and antonyms in pronounced
* indication of gradations, inversions and typical synonyms or antonyms
* Expressions and typical proverbs highlighted in black and in alphabetical order
* phonetic transcription according to the international phonetic alphabetic standard
* about 80 illustrations of regional synonymy