The word "DIZIM" is spelled with a "Z" instead of an "S". This is because it comes from the Turkish language, where the letter "Z" represents a voiced alveolar fricative sound. In IPA phonetic transcription, this sound is represented by the symbol /z/. The letter "S", on the other hand, represents an unvoiced alveolar fricative sound, which is represented by the symbol /s/ in IPA. So, the spelling of "DIZIM" reflects the specific sound that is present in the Turkish language.