To find antonyms using a thesaurus, visit Thesaurus.com or Synonym.com, and type a term into the search form at the top of the page. Antonyms for the provided word are listed below the Synonyms section within the Antonyms section.
As of January 2016, the Synonyms and Antonyms sections are color-coded; synonyms are highlighted in orange, while antonyms are highlighted in light gray. The website lists antonyms for words from the third edition of Roget's 21st Century Thesaurus. Antonyms, which are words that are opposite in meaning to another, are listed on the website, but may have a different connotation depending on the word you search for.
To view the definition for a listed antonym on the website, click an antonym to see its synonyms, or type the antonym in the search bar, and select the Dictionary.com tab. Because antonyms on the website are considered informal, verify the meaning of the term before using it.
Synonym.com is another online thesaurus that offers antonyms for each word. To find antonyms using the website, type a word in the search bar, and press Enter. The website lists the definition of the word in addition to synonyms and antonyms below the word. To view the definition of any listed antonyms, click on an antonym.