Well "malik" means king or sovereing whereas "mallaak" means owner. Both words come from the root "m-l-k" and are derived from the verd "malaka" which means to posses, to acquire or to rule over. Kingdom is "mamlakah", speaking of Fusha (if were talking about a dialect then it can be way different).
Ok, probably no one cares ;-)
Anyway there will not be much left of "Al Mamlakah As-Sindh" when my fierce omani warriors overrun their provinces, he he he