To convert PDF to Word you can either use Adobe Acrobat or Adobe Reader.
Follow the steps for Adobe Acrobat:
You can also use the free Adobe Reader for the same.
1. Click on file > save as other > Word or text online.
2. On thr right hand side pane it would show the selected pdf and a dropdown list to convert into 'docx','doc','rtf','xlsx' option.
3. Select the docx option and Click on 'Convert'
The pdf file would be converted to word file