Noun

The Noun refers to persons, animals, places, things, ideas or events etc. Nouns comprise most of the words in a language.

Noun can be -
Person - A name for a person :- Ram, Shyam, Raju, Mike, Michelle, etc.
Animal - A name for an animal :- Dog, Cat, Cow, Tiger, etc.
Place - Name of a place :- London, Australia, Canada, Mumbai, etc.
Object - Name of any object :- Bat, Ball, Chair, Door, House, Computer etc.
Thought - Name of a thought :- Devotion, Superstition etc.

Types of Noun :-

Proper Noun:

A Proper Noun is a name that refers only to a person, place or thing and there is no common name for it. In written English, a proper noun always begins with a capital letter.
Example: Mumbai (it refers to a particular city only), Ram (refers to a particular person),
India (there is no other country named Australia; this name is assigned to only one country).

Common Noun:

A Common Noun is the name of something that is common to many things, persons, or places. It includes a particular kind of things, person, or place.
Example: country (it can refer to any country, nothing in particular), city (it can refer to any city like Melbourne, Mumbai, Toronto etc but nothing in particular).

Abstract Noun:

An Abstract Noun is a word for something that cannot be seen but is there. It has no physical existence. Generally, it refers to thoughts, qualities, and situations.
Examples: Truth, Lies, Happiness, Sadness, Time, Friendship, Humor, Patriotism, etc.

Concrete Noun:

A Concrete Noun is the exact opposite of an abstract noun. It refers to things that we see and have a physical existence.
Example: chair, table, bat, ball, water, money, sugar etc.

Countable Noun:

Nouns that can be counted are called countable nouns. Countable nouns can take an article: a, an, the.
Example: chair, table, bat, ball, etc (you could say 1 chair, 2 chairs, 3 chairs - so chairs are countable)

Uncountable Noun:

Nouns which cannot be counted are called Uncountable Nouns.
Example: water, sugar, oil, salt, etc (you can't say "1 water, 2 water, 3 water" because water is not countable)
Abstract Nouns and Proper Nouns are always non-countable nouns, but common nouns and concrete nouns can be both count and non-count nouns.
uncountable noun in example sentences

Collective Noun:

Collective noun is a word for a group of things, people or animals etc.
Example: family, team, jury, cattle, etc.
Collective nouns can be both plural and singular. Although Americans prefer to use collective nouns as singular, both usages hold true in other parts of the world.
compound noun:
Sometimes two or three nouns also appear together, or with other parts of speech, and form idiomatic compound nouns. Idiomatic means that those nouns behave as a unit and, to a lesser or greater extent, are greater than the sum of their parts.
Examples: six-pack, five-year-old, and son-in-law, snowball, mailbox, etc.

Singular Noun:

Singular Noun i.e. number has singular. The root form of any noun is naturally singular and hence it is a singular noun.
Example:
Singular nouns are duck, bush, man, rat, child, fish etc.
Singular noun in a sentence:
    I have a pet dog.
    That big bush is next to our house.
    He is the man of the house.

Plural Noun:

The plural forms of a singular noun are plural nouns. These nouns determine more than one element.
Example:
Examples of plural nouns are belt, box, rat, sheep, people etc.
Plural Nouns in a sentence:
    The seat has seven belts.
    Let's unpack those boxes.
    Our house is littered with swarms of rats.

Regular Noun:

Regular Nouns do not change in spelling when converted to the plural; According to grammatical and spelling agreement, only the regular plural suffixes -s or -es are attached to it.