To underline by Words, you have 16 types of decorative underline already
available to in the Word application.
Do the following:
1. Select the paragraph
2. On the Format menu, click Font
3. In the Font dialog box, click the Font Tab.
4. Click the Underline style list and select a decorrative underline.
Note: you cannot add custom underline to each word in a paragraph.
5. Click OK.
Challa Prabhu