You can use the thesaurus to look up synonyms, and related words.
Click in the word that you want to look up.
Choose Tools - Thesaurus, or press Command Ctrl+F7.
In the Meaning list, select the definition that matches the context of the word.
Select the replacement word in the Synonym list.
If you applied a different language setting to individual words, or paragraphs, the thesaurus for the applied language is used.
To look up the word in a different language, click the Language button, and select one of the installed thesaurus languages. A thesaurus library may not be available for all installed languages. You can install languages with a thesaurus library from the Extensions web page.
If a thesaurus library is installed for the language of a word, the context menu of the word shows a Synonyms submenu. Select any of the terms from the submenu to replace the word.