What is a nominalization? [closed]

Agreeing with @FumbleFingers that your approach is mistaken. Aside from what he says, there is also the problem that a nominalization is not a noun, but rather a noun phrase (NP). A NP is a constituent which can be the argument of a verb or object of a preposition, or perhaps a few other things. The head of a NP is often a noun, but not always -- it can also be a complementizer, as for example the "that" in "That she attended surprised us", in which the clause "She attended" has been nominalized by adding "that" to create the nominalization "that she attended".

English has a large variety of nominalizations.