The Free Dictionary defines nominalization as the creation of a noun from a verb or adjective.

Although they sound fancy and sophisticated, their overuse will actually create weak and pretentious sentences.

Dragoman prefers avoiding nominalizations wherever possible.

Weak:        We will have to make a decision by 10 p.m. tomorrow.

Stronger:  We will have to decide by 10 p.m. tomorrow.

Weak:        The world leaders will hold discussions on the Syrian refugee crisis at the summit.

Stronger:  The world leaders will discuss the Syrian refugee crisis at the summit.

You can read further on ways to avoid nominalization here.