A concrete noun refers to a physical object in the real world while n abstract noun refers to an idea or concept that does not exist in the real world and cannot be touched.
Explanation:
concrete noun: a dog, a ball, or an ice cream cone.
A concrete noun refers to a physical object in the real world, such as a dog, a ball. abstract noun refers to an idea or concept that does not exist in the real world and cannot be touched, like freedom.
