thesaurus
C2Pronunciation
UK
- /θɛsˈɔːrəs/
US
- /θəˈsɔrəs/
Description
- List of similar words
- Synonym reference
- Word choice helper
- Writing tool
Imagine you're writing a story, but you keep using the same words again and again. It starts to sound dull. That is where a thesaurus helps. It is a book or website that shows words with similar meanings, so you can choose another word that fits your sentence better. It is not quite the same as a dictionary. A dictionary explains what a word means, but a thesaurus helps you find other ways to say it.
Need another word for "happy"? It might suggest "joyful," "cheerful," or "glad." Writers, students, and anyone learning English use it to avoid repeating the same word too many times and to make their writing clearer and more lively. The word comes from a Greek root meaning "treasure" or "storehouse," which suits a tool full of words.
A thesaurus is a reference book or digital resource dedicated to listing synonyms—words that have similar meanings—and often antonyms (words with opposite meanings). While a dictionary defines what a word means, a thesaurus shows you the range of words you can use instead of it.
The most famous version is Roget's Thesaurus, compiled by Peter Mark Roget in 1852. Unlike a standard dictionary, Roget's original version was organized by concept rather than alphabetically, grouping related ideas together. For example, if you are looking for words related to "anger," a thesaurus will present "rage," "fury," "irritation," and "resentment" all in one cluster. While many modern digital versions are now searchable alphabetically, the core purpose remains the same: connecting related concepts.
Using a thesaurus can significantly improve your writing by helping you avoid repetition and add nuance to your language. However, it is important to use it carefully! Not all synonyms are perfectly interchangeable; they often carry different shades of meaning or connotations. For instance, while "happy" and "joyful" are similar, "joyful" often suggests a deeper, more intense emotion. A thesaurus is a powerful tool for refining your expression, but it requires careful consideration to ensure you choose the most appropriate word for your specific context. Next time you're stuck on a word, don't just reach for a dictionary—unlock the storehouse of language with a thesaurus!
Examples
- 1
Writing essays
When I write essays, I keep a thesaurus open beside my notebook.
- 2
Online search
She looked up "happy" in an online thesaurus and found a better word for her title.
- 3
Word processors
Most word processors have a built-in thesaurus, so you can search for synonyms without leaving the page.
- 4
Word choice
A thesaurus can give you ideas, but you still need to choose a word that fits the sentence.
- 5
Overuse
He relies too much on a thesaurus, and sometimes his writing sounds unnatural.
Forms and spellings
3 forms open this card.
Main spelling
- thesaurusnoun
Forms
- thesauripluralnoun
- thesaurusespluralnoun