Proofing: Thesaurus A Thesaurus is different from a dictionary or encyclopedia. A Thesaurus organizes words by their meaning, not by spelling.   A Thesaurus has synonyms, antonyms and related words. Synonyms are different words that have almost the same meaning. Antonyms are words that mean the opposite. 5. Try This: Use the Thesaurus Go to Slide 6 in the sample presentation. Select the word: downy Go to Review->Proofing. Click on Thesaurus.   What Do You See? The Thesaurus Task Pane will open on the right side. The words you selected should be in the Search box. The Search returned several words that have the same meaning and one that has the opposite. When you click on the arrow to the right of the word you will see Insert or Copy. That's the Proofing Tools. So far, so good. Review ->Proofing-> Thesaurus Exam 77-422: Microsoft PowerPoint 2013 5.0 Manage Multiple Presentations 5.3 Protect and Share Presentations: Proof Presentations (Thesaurus)