This document discusses different types of nouns. A noun names a person, place, or thing. Proper nouns name specific people, places, or things and are capitalized, while common nouns are not. Concrete nouns refer to tangible things that can be seen or touched, while abstract nouns refer to ideas or qualities. Count nouns can be pluralized and refer to things that can be counted, whereas non-count nouns are always singular and cannot be counted. Collective nouns are singular terms that refer to a group of individuals.