A - Z Phobias
A - B - C - D - E - F - G - H - I - J - K - L - M - N - O - P - R - S - T - U - V - W - X - YO
| Objects at the right side of the body | Dextrophobia |
| Odours | Osmophobia |
| Odours (body) | Osphresiophobia |
| Old people | Gerontophobia |
| Oneself | Autophobia |
| One thing | Monophobia |
| Open spaces | Agoraphobia or Kenophobia |
| Open high places | Aeroacrophobia |
| Operations | Tomophobia |
| Opinions | Allodoxaphobia |
| Opposite sex | Heterophobia |
| Otters | Lutraphobia |
| Outer space | Spacephobia |
| Overworking | Ponophobia |
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