With Adobe Reader you can't do that - however in Adobe Reader X there is a "Save As > Word (Online)" option which will redirect you to the Adobe ExportPDF website at Acrobat.com. This is a subscription service which can convert PDF files into other formats, subject to certain limitations - for example if the PDF file is secured, it can't be processed. For help with ExportPDF, see their forum.
If you are working on a file in PDF format and you want to edit the file in Word, you can convert it to a Word document. Many third-party providers provide converters that do this. Check for the providers that offer PDF-to-Word conversion. File converters can save a PDF file as a Word document and vice versa. Although Microsoft does not provide these converters, several third-party tools are available.
If you have adobe X, simply go to "File" -> "Save-As" and Microsoft Word is an option. Also, there is a download (paid) called Able2Extract that will allow you to convert pdfs to word, excel, etc. but the formatting is often lost. If you get the premium package, you can even convert scanned documents. I've used Adobe X to do the conversion, and it retains headers, footers and all formatting.
And i personally share you with a article about how to converting PDF files to Word(.doc), you just need to follow the easy guide.
Hope it can help you a lot.