AFirst justify the document (both left and right justified), then count the number of words on one line, and multiply them by the number of lines to get a rough count.
BSelect the text that you have to count and right-click the mouse. Choose the "Word count" option.
CChoose the "Word count" from the Review Tab main menu.
DChoose the "Paragraph statistics" option under the View menu.
ECount each word one by one, since there is currently no tool available for counting the number of words