There are many  words in English which have close meanings to each other and its always hard (specially for non-native English learners) to recognize and choose when to use them. Here are some definitions & differences about some mysterious words that are so similar.

to see vs. to watch:

To see means to be aware of what is around you by using your eyes.

• For example:”I can see the smoke from here.”

To watch means to look at something for a period of time,especially Something that is changing or moving.

• For example:”I watched the cricket.”

Note: We watch things that move,such as TV,a film,sport. We look

At static things,such as a photograph,a painting,the stars.

Shortage vs. shortness:

Shortage is a noun meaning when there is not enough of something.

• For example:”There is a shortage of skilled workers in the industry.”

Shortness is also a noun meaning the condition of being short spatially.

• For example:”Shortness in children and young adults nearly always

Results from below-average growth in childhood.”

so vs. such:

So when used as in front of an adjective or an adverbs means very.

• For example:”My English teacher is so patient.She teaches us so well.”

Such when used as a determiner can be used before a noun to show extremes,you can not use it before adverb.

• For example:”She is such a patient teacher.”

Note: Remember that without the noun you need to use “so.”

Such + a + patient + teacher + so + patient

Stationary vs. stationery:

Stationary means standing still or not moving.

• For example:”The car was stationary.”

Stationery means the items needed for writing ,such as paper, Pens,pencils and envelopes.

• For example:”It is the secretary’s job to order the stationery.”

That,which,who:

Who (or whom) is a pronoun,and is used as the subject or object of a verb to show which person you are referring to,or to add information about a person just mentioned. It is used for people,

not things.

Which is a pronoun ,and is used as the subject or object of a verb to show  what thing or things you are referring to,or to add information about the thing just mentioned. It is used for things not people.

That is a pronoun ,and is used as the subject or object of a verb to show which person or thing you are referring to,or to add information about a person or thing just mentioned.It can be used for people and things. It can sometimes be omitted.

Example:

• The girl who was hungry.
• The boy whom I talked to.
• The dog that wagged its tail.
• The software(that)I WROTE.
• The company which/that hired me.

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