A thesaurus is a reference work that lists words grouped together according to similarity of meaning. Within a thesaurus, synonyms are often listed in a variety of categories such as positive or negative connotations, levels of formality, and so on. A notorious thesaurus might be one that is known for its unusual or controversial content.
A thesaurus can be a valuable tool for writers and speakers who want to expand their vocabulary or find just the right word to express their meaning. By providing a comprehensive list of synonyms and related words, a thesaurus can help users avoid repetition and communicate their ideas more effectively.
