basiphobia
/bæsɪˈfoʊbiə/Definitions
1. noun
A fear or aversion to heights or high places.
“Her basiphobia made her avoid climbing buildings for her job as a window cleaner.”
2. noun
A fear of looking down or a fear of being at a great height.
“She couldn’t help but feel a creeping sense of basiphobia as she stood on the edge of the skyscraper.”