You would have to embed the fonts. This requires some technical know-how, and you must have permission to use the font -- some are free, but most are not. (Microsoft pays the owners to install fonts on your computer, for your use, but not for you to turn around and use them in a book. That requires a license, or it requires embedding a free font, most of which are inferior.)
Finally, you run the risk that Amazon may strip out the fonts, or that the reader doesn't have "Publisher Fonts" authorized so will not see your fonts, or that he will see them and be irritated and give you a one-star review.
Don't do it, Janet. Let the defaults rule.
Good luck! -- NJ
The book: Notjohn's Guide to E-Book Formatting (revised and updated for 2017)