English has a few suffixes that can make abstract nouns out of adjectives. There's the relatively rare –cy, which turns fluent into fluency and idiot into idiocy, and there's the more common –ty or ...

Concrete nouns signify things, either in the real or imagined world. It’s usually possible to detect a concrete noun with one of the five senses. Abstract nouns refer to concepts and so cannot be ...

Common noun is one of the various types of nouns used in English grammar. Nouns are words that refer to things, people, places, and ideas. They can be classified into different types, such as Common ...