From Longman Dictionary of Contemporary Englishparanoiacpar‧a‧noi‧ac /ˌpærəˈnɔɪæk◂/ adjective x-refparanoid —paranoiac noun [countable]
Examples from the Corpus
paranoiac• Sentence 9, on the other hand, can be seen as a sort of ironic hyperbole: Arthur is paranoiac.• She has welcomed the oppressed and disowned of the world to this paranoiac dreamscape for nearly a hundred years.• They shared with the rest of their race an almost paranoiac fear and hatred for the informer.• Most of my friends are thin, and sometimes I have this paranoiac feeling that they are using me. 