Well ..... yes ....
In WORD you can always select text and left-mouse click and drag to move it elsewhere.
However, if you are formatting the document using 'Styles' (e.g. using Heading1, Heading 2 etc. instead of just 'Normal' for your headings and sub-headings) you can make use of the 'Outline' view from the 'View' menu. Using the Outlining toolbar buttons you can 'collapse' (filter) the text as required (e.g. to perhaps just show the headings) and then click and drag whole paragraphs around by selecting and dragging the heading(s) to where you want them.