Unlike Adobe Acrobat and Corel WordPerfect, Word doesn'€™t come with a built-in redaction tool, which means that you can'€™t permanently hide text in a Word document. Still, you can add that functionality to Word 2010s Review tab by installing the Word 2007 Redaction Tool. Just be careful €”when text is replaced by a black box, you can'€™t press Ctrl-Z to reverse the redaction.