Difference between salt and corn in Korean
소금·옥수수

소금salt
The word "salt" means a white mineral that people use to make food taste better. In Korean, this is 소금. You can use it when talking about cooking, eating, or buying food ingredients.

옥수수corn
옥수수 means corn, the yellow kernels that grow on a cob. People use this word for corn you eat at home, buy at a market, or enjoy as a snack. You may hear it for boiled corn, grilled corn, or corn in other foods.
The difference
소금 is salt, used to add flavor when cooking or eating. 옥수수 is the actual food you eat, not a seasoning.