PDF Reflow
Word 2013's PDF Reflow feature was designed with attention to heuristics, or the program’s built-in ability to deal with tables, lists, headings, paragraphs, columns, and the like. PDF Reflow allows Word 2013 to make PDFs into editable Word documents.
By opening a PDF in Word 2013, you will essentially create a new Word document which retains an impressive amount of structure. This is a comparative feat for a word processing program since it means taking on more than just text.
That said, Microsoft Word is still not an absolute substitute for a full version of something like Adobe Acrobat.