To display the AutoCorrect dialog box, press Alt + T + A or click AutoCorrect from the Quick Access Toolbar. Word displays the AutoCorrect dialog box.

Note: If AutoCorrect is not available in your Quick Access Toolbar, read the following article to add AutoCorrect to your Quick Access Toolbar.

https://wordknowhow.wordpress.com/2013/05/14/how-to-customize-the-quick-access-toolbar-in-word-2007/?preview=true&preview_id=319&preview_nonce=f77d720900&post_format=standard

https://wordknowhow.wordpress.com/2013/06/06/how-to-use-autocorrect-feature-in-word/?preview=true&preview_id=442&preview_nonce=786767bcc8&post_format=standard

On the AutoCorrect dialog box, in the Replace field, type the entry that you want to delete.

Select the entry and then click the Delete button. You are done.