Tetradecaphobia is fear of the number 14.
In the Chinese culture, the number 14 is considered an extremely unlucky number, since 14 sounds like "will certainly die (實死)" in both Putunghua and Cantonese. As a result, people suffering from Tetradecaphobia may also have Thanatophobia, the fear of death.
14 also refers to the Fourteen Words, which are used by white supremacists, leading some to fear the number 14.