Re: Does anyone know how to send a word document as a text message using an iphone 6plus?
Welcome to iMore!
I don't think you can do that without jailbreaking the phone. (Someone will chime in to correct me if I am wrong.)
If you need to share documents you can do so with a free Dropbox account. Just create a folder and invite the other person via email to share the folder with you (they'll need Dropbox, too.). When you drop a file (any type of file) into that folder it will auto-magically appear on their end inside that folder.
If Dropbox is still offering it, each time you invite someone to Dropbox via email with a special link and they sign up from that link for a free account, they add more free storage to your account. Mine's maxed out at 19.75 GB of free storage.