How to open word document file in terminal?

Technically speaking xdg-open should work for all file types. It'll just open them in the appropriate application. All the document mime types are mapped to Libre Office by default so this should just work:

xdg-open document.doc

You can open it with help of libre-office-writer by following command (open with libre office writer):

lowriter "<path/to/file>"

From man libreoffice:

Name
       libreoffice - LibreOffice office suite

SYNOPSIS
       libreoffice [--accept=accept-string] [--base] [--calc] [--convert-to output_file_extension[:output_filter_name] [--outdir
       output_dir] file]...  [--display display]  [--draw]  [--global]  [--headless]  [--help|-h|-?]  [--impress]  [--invisible]
       [--infilter=""]  [--math]  [--minimized]  [-n file]... [--nodefault] [--nolockcheck] [--nologo] [--norestore] [-o
       file]... [-p file...]  [--print-to-file [--printer-name printer_name] [--outdir output_dir] file]...   [--pt  printername
       file...]    [--show   Impress  file]...  [--unaccept=accept-string]  [--terminate_after_init]  [--view  file]...  [--web]
       [--writer]  [file...]
       lobase
       localc
       lodraw
       lofromtemplate
       loimpress
       lomath
       loweb
       lowriter

DESCRIPTION
       LibreOffice (LO for short) is a multi-platform office productivity suite.

It should work with Libre Office.

libreoffice document.docx