A family of Microsoft word processing software products for creating web, email, and print documents.
The specific AutoCorrect entries you mention are already built into Word, and they are saved in .acl files, not Normal.dotm, so you should not lose them even if Normal.dotm is deleted or overwritten. The .acl files are language-specific, so you may have more than one. Only formatted AutoCorrect entries are saved in Normal.dotm. That said, saving a copy of your customized Normal template is always a good idea.
AutoText entries are saved in Normal.dotm by default but can be saved in any template. If you are having trouble with keeping them, it might be a good idea to create a new template just for the AutoText entries. Save that template in the Word Startup folder (thus making it a global template), and they will be available to any document.