Which word describes the fear of Friday the 13th?
The word is triskaidekaphobia. Its literal meaning is 'superstition about the number thirteen', but it's also used to refer to the specific fear of Friday the 13th. There is also the word paraskavedekatriaphobia, proposed by some as a more specific option, although this word is not yet in our dictionaries.
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Or take a look at our list of phobias.