A thesaurus is a reference work that lists words grouped together according to similarity of meaning (synonyms) within one language.
Thesaurus can help writers find the right word to express their ideas clearly and concisely. It can also be used to expand vocabulary and improve writing skills. The first thesaurus was published in 1852 by Peter Mark Roget, an English physician and philologist. Roget’s thesaurus was originally intended to help people find the right words to use in scientific writing. However, it quickly became popular with writers of all kinds.Today, there are many different types of thesauri available, including print thesauri, online thesauri, and software thesauri. Some thesauri are general-purpose, while others are designed for specific fields, such as law or medicine.