AntiWord is a outdated command-line utility for converting document files created by Microsoft Word to either Ascii or PostScript. It has not been updated since 2005. The word processor Microsoft Word has been updated many times since then and it's file format has been changed time and time again over the years.
Free, modern and still-maintained office suits like LibreOffice do a much better job at opening Microsoft Word documents.
AntiWord is still available in most distributions repositories under the name
antiword and it it's homepage is still alive at winfield.demon.nl. You can try it if you really want to - but it really is quite pointless unless you have some Word file created a very long time ago (1990-2005).