Is an irrational fear less irrational if a ton of people have it? If you don't have a problem with spiders crawling all over you, maybe you're the irrational one.

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A new survey had Americans rank their biggest phobias. Here are the 10 most common ones:

  1. Acrophobia – a fear of heights.
  2. Arachnophobia – fear of spiders.
  3. Claustrophobia – fear of tight spaces.
  4. Ophidiophobia – fear of snakes.
  5. Thalassophobia – fear of deep water.
  6. Necrophobia – fear of death.
  7. Glossophobia – fear of public speaking.
  8. Coulrophobia – fear of clowns.
  9. Trypanophobia – fear of needles.
  10. Entomophobia – fear of insects.