Nouns can be abstract or concrete. Concrete nouns are tangible and you can experience them with your five senses. Abstract nouns refer to intangible things, like actions,feelings, ideals, concepts and qualities.
See more on this abstract noun word list.
These examples of abstract nouns show just some of the many varieties of this noun and the ways it communicates something that cannot be experienced with the senses. Since abstract words are by definition abstract, they can mean different things to different people. Make sure that your writing also contains concrete nouns, so your meaning is clear.