WordPress contains a useful tool that can help resolve many of the display issues that occur when pasting a Word document into a WordPress post/page.
On the second level of the WordPress editor toolbar (show by click on the end button ‘Show/Hide Kitchen Sink’ – or press Alt + Shift + Z), there is a button that is called ‘Paste from Word’.
If you click on this button, it will pop up a box that will allow you to paste in the contents of your Word document.
However, be aware that WordPress strips out a lot of the Word formatting (think paragraphs, bold, italic, bullets), but it will give you a starting point to import your document into Word.