Click on 'File' at the menu bar and then click on 'Save As.' Name the document. Then, just below the file name is the dialogue, 'Save as type:'. Choose 'Document Template (*.dot).' You'll notice the directory at the top of the dialogue box changes to 'Templates.' Click 'Save' and you're done.
You can create professional looking web form templates, just clicking a few times on word. Couldn't believe, right? YES, you can use Microsoft word to create professional form templates for your site. Definitely, it will be a plain one, with no visual interfaces, but this will work like a professional form, trust me!