Forgot Password?
First type something on your document.
Click language from the TOOLS menu.
Select THESAURUS and choose your word.
Or click on Thesaurus at the mid right of the PROOFING option from the Review tab and choose your word from the document by Alt + Click (A dialog box will appear at the right of the document).
Click on REPLACE button.
Or point the cursor at the right of your desired word. Click on the arrow icon and choose Insert to insert the word in the document, Copy to copy the word and Look Up to change the words.