1. Nouns
One of the most important types of words in English are nouns. Nouns indicate people, things, objects, concepts, etc.
There are seven types of nouns in English. Each type of noun can have important grammar rules when used.

2. One type of noun is the uncountable noun, also called mass noun or non-count noun. This type of noun is always used in the singular because it can not be counted.
When we refer to quantities we use the word “much”.
Examples
I don’t think we have enough room.
How much water do you usually drink?
Did your mother buy much coffee at the supermarket?
There isn’t much time to finish.

3. Another type of noun is the countable noun, also called count noun
Another type of noun is the countable noun, also called count noun. This type of noun can be modified by a numeral and that occurs in both singular and plural form.
When we refer to quantities we use the word “many”.
Examples
There is a chair in this room. There are two chairs in that room.
How many cars are there in front of the school?
Does your friend read many books a year?
There isn’t an apple here. There are several apples.

4. Abstract Nouns are nouns that refer to concepts, ideas, emotions, etc
Abstract Nouns are nouns that refer to concepts, ideas, emotions, etc. Abstract nouns are nouns that you can not touch, are not made of materials, but play an important role in life.
Here is a list of some common abstract nouns:
success depression love hate anger power importance tolerance

5. Collective Nouns refer to groups of various types
Collective Nouns refer to groups of various types. Collective nouns are most commonly used with groups of animals. They can be used in both the singular and plural, although collective nouns tend to be used in the singular.
Here are some common collective nouns referring to groups of animals:
herd (of sheep) litter (of puppies) pack (of wolves) swarm hive

6. Proper Nouns are the names of people, things, institutions, nations, etc. Proper nouns are always capitalized.
Here are some examples of proper nouns:
Canada University of California Tom Alice
Panama
London

7. Common Nouns refer to categories of things in general, never to specific examples something that are named. In other words, when speaking about education in general someone might refer to “university” in a general sense.
I think Tom should go to university to study science.
In this case, “university” is a common noun.

8. On the other hand, when “university” is used as part of a name it becomes part of a proper noun.
Meredith decided to go to the University of Oregon.
Note that common nouns that are used as the part of a name and become proper nouns are always capitalized.

9. Here are some common nouns that are often used as common nouns and part of names.
university college school institute department state
Examples
There are a number of states which are in financial difficulty.
I think you need to go to college.