Nouns are simply the names we give to everything around us, whether it be a person, an event, a place or an object, etc. Every particular name used to define something is a noun. E.g. : Rakesh, John, Deepika, Martina, Blackberry, Honesty, Driver, etc.
The different types of Nouns are
These nouns are the names of specific people and places. These nouns also refer to the names of the days of weeks and months, and also the various names for religions, organizations, institutions, etc. Proper nouns basically refer to the names that are specific to that particular noun. These nouns are always capitalised as they need to be distinct from other nouns.
Everyone dislikes Monday mornings.
These are the nouns that are used to denote a general category of people, places or things. They are capitalized only when they are at the beginning of a sentence. Common Nouns don't refer to something specific rather they are a general term used for every noun of a particular kind or type.
The boys went to play cricket
These nouns are the names of things that we cannot perceive through our five senses of touching, smelling, seeing, hearing and tasting. These nouns can also refer to medical conditions related to the mind and are also used to express thoughts.
His bravery in the war won him a medal. - The abstract noun bravery is used to name the motivation behind certain actions made by people.
The nouns that fall under this category are the ones that have both singular and plural forms. They can be counted either relatively or completely, and form plurals to associate with plural verbs in a sentence. They can also be expressed in numerical terms
I need to buy four new suitcases for my trip. - Suitcase (s) is a countable noun as adding 's'to it makes it plural.
These nouns are the exact opposite of Countable Nouns. These nouns are the names of things that cannot be counted and have only a singular form. These nouns use singular verbs in a sentence.
The furniture was damaged in moving out. - Furniture is an uncountable noun and therefore, we use the singular 'was'in referring to it.