Answer:
Infinite
Step-by-step explanation:
You can be scared of anything, actually.
Here's just a small list of my favorite ones.
- Hexakosioihexekontahexaphobia - fear of 666
- Aibohphobia - fear of palindromes (the word is literally a palindrome)
- Hippopoto-monstro-sesquipedaliophobia - fear of very long words
- Phobophobia - (self explanatory lol)