If you prefer help in Polish to help in English, then maybe someone at www.elendilion.pl might be of assistance. http://www.lodz.tpsa.pl/bez/Tolkien/Arda/khuzdul.html has an analysis of what little genuine Tolkien-Khuzdul we have, in Polish (the page is a translation from Ardalambion).

You might want to check http://midgardsmal.com/category/khuzdul/ (David Salo) and https://dwarrowscholar.wordpress.com/khuzdul/documents-dictionaries/ (The Dwarrow Scholar) for two of the most prominent non-Tolkien attempts to reconstruct 'whole' Khûzdul (they are partially intersecting). They are not Tolkienian but impressive conlangs as they are.