What is a thesaurus primarily used for?

A thesaurus is primarily used to provide synonyms and related concepts. It serves as a tool for writers, students, and anyone looking to enhance their vocabulary by offering alternatives to words, which can help avoid repetition and improve the richness of language. By consulting a thesaurus, individuals can find words with similar meanings, allowing for more precise or varied expression in their writing. This capability is particularly useful when trying to convey a certain tone or when one is aiming to articulate ideas in a more engaging manner. The use of a thesaurus can lead to more effective and nuanced communication, making it a valuable resource in both academic and creative contexts.