If you have a valid Microsoft 365 subscription or a licensed copy of Office, you can technically create a portable workspace, but not a standalone .exe file. Here is the ethical and practical method.
If you need to use Word without a standard desktop installation, use these official Microsoft methods: Is MSWord portable legal to use? - Microsoft Q&A Microsoft Office Word Portable Download
A portable version runs directly from a USB drive without installation. While it sounds convenient, using unofficial portable software carries significant risks. If you have a valid Microsoft 365 subscription
What do you plan to use? (Windows, macOS, ChromeOS?) Microsoft Office Word Portable Download