triskaidekaphobia triskaidekaphobia /trɪskaɪdɪkəˈfoʊbiə/

noun

1. A morbid fear of the number 13  ( triskaidekaphobia )
   a morbid fear of the number 13
    Hotels often skip the 13th floor due to triskaidekaphobia.
   Hotels often skip the 13th floor due to triskaidekaphobia.