corn vs food in Korean
옥수수vs음식

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.
When to use corn
음식food
Food means things that people eat. In Korean, 음식 means meals, dishes, or food in general. You can use this word when talking about cooking, restaurants, shopping, or what you like to eat.
When to use foodHow they differ
음식 means food in general. 옥수수 is one specific food, not all food.