Nouns that label people, places, or things that can be seen or recognised through any of the five senses are called concrete nouns. Nouns that label other things, such as ideas, actions, conditions, and qualities are called abstract nouns.
In other words, Concrete nouns are words that represent objects one can see, hear, touch, smell, taste with the senses. While abstract nouns are anything one cannot see, hear, touch, smell or taste.
Concrete nouns refer to corporeal entities that can, in principle at least, be observed by at least one of the five senses.
CONCRETE NOUNS EXAMPLES:
Abstract nouns refer to things that cannot be seen, observed or touched, as ideas and concepts (justice or hatred).
ABSTRACT NOUNS EXAMPLES: