To replace means to put something else in its place.

When something gets old and begins to breakdown, it may need to be replaced.

to tear someone down means to saying something bad or negative things about them.

to construct something means to build it or put it together.

Large construction projects include buildings,bridges and origination.

The opposite of constructive is destructive.

To organize something means to arrange things in an orderly logical way. 

An organization is something that has a logical structure, such as a well-managed company.

To support something such as an idea is to help or add strength to it.

The opposite to support is to undermine or weaken.