Arachnophobia, acrophobia, and agoraphobia
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Three clinical phobias: arachnophobia (fear of spiders), acrophobia (fear of heights), and agoraphobia (fear of crowds/open spaces), combined by Frasier into the portmanteau 'arachno-acro-agoraphobe.'
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Mentioned once in Coots and Ladders.
Coots and Ladders
Season 11 · Episode 17 · S11E17
“you are looking at that rarest of beasts, the arachno-acro-agoraphobe”