The difference between Build up and Shut

When used as verbs, build up means to erect, whereas shut means to close, to stop from being open.

Shut is also noun with the meaning: the act or time of shutting.

Shut is also adjective with the meaning: closed.

check bellow for the other definitions of Build up and Shut

Build up as a verb:

To erect; to construct.
Build up as a verb:

To close up by building.

Examples:

"to build up a door"
Build up as a verb (intransitive, transitive, idiomatic):

To accumulate, to pile up, to increase in stages.

Examples:

"Ever since the secretary left, the letters in my inbox have started to build up."
Build up as a verb (transitive, idiomatic):

To strengthen.

Examples:

"They had to build up their fortress to protect against attack."
Build up as a verb (card games):

In solitaire card games, to place a card over another card of lower value. (e.g., place 5♦ over 4♣)

Shut as a verb (transitive):

To close, to stop from being open.

Examples:

"Please shut the door."

"The light was so bright I had to shut my eyes."
Shut as a verb (intransitive):

To close, to stop being open.

Examples:

"If you wait too long, the automatic door will shut."
Shut as a verb (transitive, or, intransitive, chiefly, British):

To close a business temporarily, or (of a business) to be closed.

Examples:

"The pharmacy is shut on Sunday."
Shut as a verb:

To preclude; to exclude; to bar out.

Shut as a noun:

The act or time of shutting; close.

Examples:

"the shut of a door"
Shut as a noun:

A door or cover; a shutter.

Examples:

"rfquotek Sir Isaac Newton"
Shut as a noun:

The line or place where two pieces of metal are welded together.

Shut as a noun (British, Shropshire, _, dialect):

A narrow alley or passage acting as a short cut through the buildings between two streets.