The spelling of the word "paranoeac" might seem odd, but it actually follows a logical system. Using IPA phonetic transcription, we can break down the spelling: /pærəˈnoʊɪæk/. The first syllable, "par," is pronounced like "pair," followed by "a" as in "aqua." The next syllable, "noe," rhymes with "toe," and the final syllable, "ac," is pronounced like "ack." This results in the unique spelling of "paranoeac" for a word that is not commonly used in everyday language.
Paranoiac.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.