A family of Microsoft word processing software products for creating web, email, and print documents.
Since Excel prints on the new Mac, I’d check what Word is sending to the printer before changing the printer setup again. The older Mac printing the same documents also makes the new Mac’s settings worth checking.
Here are some suggestions you can try:
In System Settings > Printers & Scanners, change Default printer from Last Printer Used to the printer you actually use. Quit and reopen Word, then check that the same printer is selected under File > Print.
In Word, open File > Page Setup and make sure the paper size matches the paper in your printer. Check the paper size again in the Print window; Word and the printer can have separate settings.
If the Print window opens but nothing comes out, try changing the document’s font temporarily. A font can prevent a Word document from printing even when other apps print normally.
Finally, check Help > Check for Updates in Word, or App Store > Updates if you installed Word from the App Store.
The key distinction is whether Word’s Print window doesn’t open at all or opens but the job doesn’t print. That detail would help narrow down the next step.