A family of Microsoft word processing software products for creating web, email, and print documents.
If the missing font is a Microsoft 365 cloud font, Word may restore it automatically after you sign in to Office and reopen the document. You can also try updating Office, closing Word fully, and then opening the file again so Word can download the cloud font.
For regular font files, the simple fix is to install the font again in Windows. Download or copy the correct .ttf or .otf file, right-click it, and choose Install. You can also place the font file in:
C:\Windows\Fonts
After installing it, restart Microsoft Word and check the font list again. If the document was created on another computer, also check whether the font was embedded in the Word file, because older Word versions may replace missing fonts with another similar font.
For anyone trying to identify a similar text look before replacing a missing font, checking different font styles can also help compare how the text may appear.