Loony
Loony noun - A person judged to be legally or medically insane.
Usage example: his insistence that aliens from outer space were monitoring his thoughts forced doctors to conclude that he was in fact a loony
Psychopath is a synonym for loony in mad person topic. In some cases you can use "Psychopath" instead a noun "Loony".
Nearby Word: loon
Psychopath
Psychopath noun - A person judged to be legally or medically insane.
Usage example: declared that he was a dangerous psychopath who needed to be locked up
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Synonyms for Psychopath
Loony is a synonym for psychopath. You can use "Loony" instead a noun "Psychopath". informal substitute
Nearby Words: psychopathic, psychopathy
Mutual synonyms
Both words in one sentence
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He is quite, quite mad, but whether he's an out-and-out loony or just a very driven psychopath with a twisted sense of humour changes from story to story.
Source: Obfuscating Insanity - Caligari, in which Mad Scientist Caligari is actually a perfectly kind psychologist, his sleepwalking hitman is just a harmless loony, and the hero turns out to be a paranoid psychopath.
Source: Dark Is Not Evil / Film
Cite this Source
Psychopath and Loony. (2016). Retrieved 2026, July 28, from https://thesaurus.plus/related/loony/psychopath
Loony & Psychopath. N.p., 2016. Web. 28 Jul. 2026. <https://thesaurus.plus/related/loony/psychopath>.
Psychopath or Loony. 2016. Accessed July 28, 2026. https://thesaurus.plus/related/loony/psychopath.
Google Ngram Viewer shows how "loony" and "psychopath" have occurred on timeline