I couldn’t resist adding a bonus word today in honor of Friday the 13th.
TRISKAIDEKAPHOBIA is the word for fear of Friday the 13th or of the number 13, actually.

The word itself comes from a combination of several Greek words.

Tris = three

Kai = and

Deka = ten

Phobos = fear

So, easy peasy, it’s the fear of three and ten.