hypsophobia

English

Etymology

hypso- +‎ -phobia

Noun

hypsophobia (uncountable)

1. Fear of heights.
   • 1967, Sue Kaufman, Diary of a Mad Housewife, page 94:

     Though I had more instructions, I was overcome by a huge dizzying wave of hypsophobia as I stared at him, his boots balanced on the narrow sill, his rear end dangling in outer space.