Nominalisation is an important feature of academic writing. It is a function that not only helps you to create variety in your writing, but also prevents you from repeating the same verb/word over and over again. It is a useful skill to have in academic writing because it conveys an objective, impersonal tone. It can also make the text more concise by packing a great deal of information into a few words. As a consequence of using nominalisation, your writing will be more abstract and more formal.
Nominalisation is a noun phrase generated from another word class, usually a verb. (Other word classes include adjectives and nouns) In other words, the process of nominalisation turns verbs (actions or events) into nouns (things, concepts or people).
Student numbers are increasing rapidly from year to year and the University is becoming concerned that they may need to build more accommodation in order to house everyone.
The rapid increase in student numbers is causing concern at the University. More accommodation may have to be built in order to house everyone.
Sentence 2 contains a nominalised expression