Final answer:
Port and Sherry are two fortified wines that can be made either sweet or dry, with Port commonly known as a dessert wine and Sherry ranging from dry to sweet.
Step-by-step explanation:
Two fortified wines that can be made either sweet or dry are Port and Sherry. Port is a sweet, rich wine that is often served as a dessert wine, although dry, white styles are also available. Sherry can range from dry to sweet, with types like Fino and Manzanilla being on the dry end, and Pedro Ximénez being an example of sweet Sherry.
Both of these wines are fortified by the addition of grape spirit or brandy, which increases their alcohol content and alters their flavor profile.