Description: A thesaurus is a linguistic tool used to find synonyms and antonyms of words, thus facilitating the search for related terms and enriching vocabulary. Unlike a dictionary, which focuses on defining words and providing their usage in context, a thesaurus organizes words into groups of meaning, allowing users to explore different nuances and alternatives. This tool is especially useful for writers, editors, and students, as it helps them avoid repetition of terms and improve the fluency of their texts. Thesauri can be presented in printed or digital format, and many word processing programs include integrated thesaurus functions. Additionally, thesauri are fundamental in the field of computational linguistics and artificial intelligence, where they are used to enhance natural language understanding and text generation. In summary, a thesaurus is not only a valuable resource for enriching language but also plays a crucial role in the development of technologies related to language processing.