A family of Microsoft word processing software products for creating web, email, and print documents.
Does this cover everything?
Not necessarily... it depends on what customizations you've made.
If you've created your own templates (*.dotx or *.dotm files), by default those are also in the folder %appdata%\Microsoft\Templates and need to be backed up along with the Normal.dotm file. If you've deliberately saved them in a different folder, back them up from there. For instance, if you wrote macros in templates for add-ins, they'll be in %appdata%\Microsoft\Word\Startup.
If you saved any Quick Parts (AutoText or other kinds) anywhere other than Normal.dotm, back them up. In particular, look at %appdata%\Microsoft\Document Building Blocks\1033\Building Blocks.dotx, and back it up if its Modified date is recent. (If you use languages other than US English, check the files in the numbered folders next to 1033.)
If you installed and used fonts that didn't come with Office, back them up. Some will be in C:\Windows\Fonts along with those installed with Office or Windows. Ones downloaded from Microsoft will be in folders within C:\Users<your login name>\AppData\Local\Microsoft\FontCache\4\CloudFonts.
If you added words to the spell-checking dictionary, back up the file %appdata%\Microsoft\Proof\Custom.dic. Also, look at the folder %appdata%\Microsoft\Office\16.0, which contains one or more subfolders with random hexadecimal numbers as names. Open the most recently modified subfolder, open the Proofing folder there, and back up the RoamingCustom.dic file it contains.
If you created any new "plain text" items in the AutoCorrect dialog, those will be in one or more of the *.acl files in %appdata%\Microsoft\Office, each for a different language; for example, MSO1033.acl is for US English.
It may be useful to back up Word's section of the registry by exporting the key Computer\HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\16.0\Word and all its contents from the Registry Editor. The File > Export command on the menu will create a .reg file of the selected key (you must supply the file name and path) that can be used to restore all the values in that key and its subkeys.
You should read the article https://wordmvp.com/FAQs/General/FilesToBackup.htm although it's old and some of it no longer applies to current versions.
One last bit of advice: The easiest way to be certain that you backed up everything you may need to restore is to make an image backup, a snapshot of the entire drive that contains all your files and settings.