The word "predacities" is commonly misspelled as "predacity". The correct spelling of the word is a bit tricky, but can be explained using IPA phonetic transcription. "Predacities" should be spelled as /prɪˈdæsɪtiz/ with the emphasis on the second syllable. The word is derived from the term "predacious", meaning having a tendency to prey on others, and the plural form ends in "-ities" which refers to a state or quality. Therefore, the correct spelling of the plural form is "predacities", not "predacity".