Not surprised re: LibreOffice, as they dropped Word v6 back at v4 of their suite.
Might try OpenOffice, as their app suite is very slow changing, so might have 5 support in it.
If you have Dropbox or some other cloud storage product (aside from iCloud), might upload to it and see if you can view via web site, mobile app.
There used to be an MS Office viewer tool, but do not believe MS offers it any longer. And not sure that it ever supported such an old format.