Corn starch is a common ingredient in many recipes, especially in baking and sauces. However, there are many synonyms for corn starch that can be used in place of it. Some common alternatives include arrowroot powder, potato starch, tapioca starch, and rice flour. These substitutes are gluten-free and work similarly to corn starch as a thickener or binding agent. Another option is to use wheat flour or all-purpose flour, but these may not work as well in gluten-free or low-carb recipes. Depending on the recipe and dietary needs, there are many options available to replace corn starch.