A family of Microsoft word processing software products for creating web, email, and print documents.
Depending on what you need, there is no requirement to pay for a Microsoft 365 subscription. If you want to, you can continue using the free web apps (Word, Excel, PowerPoint and Outlook). You can only save files to OneDrive, not to your hard drive.
Alternatively, try one of the open source Office suites, such as LibreOffice. It includes a word processor, a presentation program and a spreadsheet program, and these can create files that are fairly compatible with their Microsoft Office counterparts.
P.S. It is possible to get a perpetual (one-time payment) license of Office, either Office Home 2024 or Office Home & Business 2024. Both of these products are for one user and one computer (PC or Mac).