Other:
The loss of freedom, being enslaved. Losing the sense of free will.
I'm not sure if it is exactly a fear as set forth here, but certainly a neurosis that manifests as fear at worst, extreme discomfort at least. It is strange, while I tend to be very jumpy and will fright over sudden unexpected noises, traditional "scary" things don't bother me, and horror movies only get me when they use the "sudden loud noise/something appearing on the screen" trick.
However, watching, "Pacific Heights", reading, "1984", any story involving wrongful imprisonment, situations that involve someone being framed/setup, and that sort of thing scares me to death. Horror movies are nothing for me, but a story where someone has their free will taken away from them scares me to death.
I'm deathly afraid of spiders, but I'm working on that one.
And lastly, and probably the most troubling as an androgyne: being forcibly and publicly outed and experiencing socially crushing obloquy and revilement. Then attached to that is a less severe fear of being completely alone.
(Special thanks to Brianna for the introduction to the word obloquy, and a whole other agglomeration of assorted bombastic and obscure words I discovered while looking it up. Which reminds me of another fear: finding myself aphasic)