A thesaurus helps you learn new words to replace common ones, making your language richer. To improve your essays, use a thesaurus to find more expressive words.
Pro Tip 2/3
Avoid Repetition
Using a thesaurus prevents you from repeating the same word too often in your writing. She consulted a thesaurus to vary her use of 'happy' with synonyms like 'joyful' and 'content'.
Pro Tip 3/3
Context Matters
Some synonyms in a thesaurus may not fit the context of your sentence, so choose carefully. Although 'cry' and 'whisper' are synonyms for 'speak', they won't work in every context.