What is the Difference Between Similar But Different Things, Terms, and Objects

What is the Difference between Polenta Cornstarch Masa Cornmeal and Maize Meal

Maize or corn is not only a delicious food item that can be eaten in raw form, but also used a raw material for lots of food items and recipes. Polenta, Cornstarch, Masa, Cornmeal and Maize Meal are the names of some food recipes that are all based on corn or maize as a major raw item.