Verdict: Partly
Partly. There is no Word for Linux and Microsoft's system requirements list only Windows and macOS, but Word for the web runs in a browser on Linux and free desktop suites open and save .docx files.
Microsoft has never shipped Word for Linux. The system requirements for Microsoft 365 at home list Windows and recent versions of macOS, and nothing else. There is no installer to hunt for.
What you can still use is Word in a browser. Sign in at office.com with the same Microsoft account and the web version of Word opens your documents from OneDrive. It looks close to the app and handles everyday letters, reports and CVs. It is thinner than the installed version, so mail merge, some referencing tools and add-ins are missing, and it needs an internet connection.
For working offline the usual answer is LibreOffice Writer, which comes preinstalled on Ubuntu and Fedora, or ONLYOFFICE if you want a ribbon that looks like the one you know. Both open .docx and save back to it.
Plain documents come across cleanly. Heavily formatted ones are where to be careful: page breaks can shift, and documents built on tracked changes and comments shared with Word users are safer kept in the browser version. Open a few of your real files before you delete anything.
The closest look to modern Word, ribbon and all, and .docx is its normal working format rather than a conversion.
Your files: Opens and saves .docx and .doc. Complex layouts and macros can still shift.
Already installed on Ubuntu and Fedora. Menus are arranged differently to the ribbon, so expect a week of hunting for things.
Your files: Opens and saves .docx. Its own format is .odt, so remember to pick Word format when sending files to Windows users.
Free suite that copies the Office look closely. Ads appear in the free version and it is not open source.
Your files: Opens and saves .docx with generally good layout fidelity.
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