The correct spelling for the words "Diseases Cat" is "Diseased Cat." The word "diseased" is spelled with "ea" instead of just "e" because it follows the long "e" sound. In IPA phonetic transcription, the word is spelled as /dɪˈziːzd kæt/. The symbol "ɪ" represents the short "i" sound, while "iː" represents the long "e" sound. The symbol "æ" represents the short "a" sound. Thus, the correct spelling for the phrase would be "Diseased Cat."