A family of Microsoft word processing software products for creating web, email, and print documents.
Since you can see your documents but Word won’t open, the Word app itself is likely the issue.
Please try repairing Office: Go to Control Panel > Programs and Features > Microsoft Office / Microsoft 365 > Change. Run Quick Repair first, and if it still doesn’t work, run Online Repair.
If the problem continues, uninstall and reinstall Microsoft Office.
Your documents are safe since you can access them through File Explorer.