Fohci's answer is wrong, I'm afraid. Of course you can bake potatoes! So what's the difference between a baked potato and a roast potato? Both cooking methods usually involve a closed oven. We bake potatoes whole. The dry heat of the oven hardens the skin into dry shell, while the entire potato cooks inside this 'jacket'. No oil or fat is involved in the baking of a potato. With roast potatoes, we usually peel and cut them into pieces first and then - this is the key difference - we use hot oil or fat to coat them. This oil or fat covers all the surfaces of the potato pieces, and it hardens into a golden, glossy, crisp coating. That's the difference. Other things which are baked using dry heat are bread, rolls, cakes, biscuits/cookies and scones. Some of these products may contain fat/oil/butter in the mixture, but the product dries during cooking. You put a soft dough or semi-liquid mixture/batter into the oven, and the baking dries and hardens into bread, cake or cookie. In the case of pies, tarts and quiches, the pastry crust hardens while the filling may or may or may not solidify slightly. Roasting involves hot oil or fat. It's mainly used for meat (roast beef, roast chicken, roast leg of lamb, for example). When roasting meat, it is usual to baste it - this involves pouring oil, fat or the greasy meat juices over the food periodically during cooking. In this way, the outside seals and browns while the inside remains moist. You can also seal in the flavour of vegetables in a similar way by basting them in hot olive oil in the oven. I hope that's clearer now.

Roasted = to cook on fire (like a barbecue) Baked= Generally it’s for bread (we baked the bread)

This website may help: https://www.thekitchn.com/whats-the-difference-between-roasting-and-baking-word-of-mouth-211695

Thank you, Nanren888!

The term roasted varies with locale.