I'm not sure whether this question is on-topic or not. But I post this answer anyway since my comments were deleted for some reason. 

The status of 'optimalization' as a word is inconclusive even though you can find it in [Collin Dictionary]( https://www.collinsdictionary.com/dictionary/english/optimalization) and [Oxford Dictionary](https://en.oxforddictionaries.com/definition/optimalization). So I recommend you not use it by any means. 

Even Google detects it as a misspelling. 

Bryan A. Garner in *Garner's Modern English Usage* considered it a non-existent word. 

> <i><b>optimize</b> (= to make the best use of) is the word, not 
*optimalize[...]</i>
>
>    <i>LANGUAGE-CHANGE INDEX</i><Br>
>    <i>*optimalize for optimize: Stage 1,</i><Br>
>    <i>Current ratio (optimized vs. *optimalized): 7,885:1</i>

So if you want nominalize it, you must use the base "optimize" (NOT <s>optimalize</s>). So it should be "optimization."