Using the thesaurus, you can look up synonyms (different words with the same meaning) and antonyms (words with the opposite meaning). Tip: In the desktop versions of Word, PowerPoint, and Outlook, you can get a quick list of synonyms by right-clicking a word and choosing Synonyms. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.