TextEdit opens files from most other word-processing applications, including Microsoft Word. If you have difficulty opening a file in TextEdit, or if the file does not look the way you expected, try converting it to a Rich Text Format (RTF) file.
Open the document in its original application.
Save it or export it as a Rich Text Format (RTF) file.
You may also be able to save or export the document from the original application as a plain text file, but you’ll lose any text formatting such as bold text.