| Obesophobia |
Fear of gaining weight.(Pocrescophobia) |
| Ochlophobia |
Fear of crowds or mobs. |
| Ochophobia |
Fear of vehicles. |
| Octophobia |
Fear of the figure 8. |
| Odontophobia |
Fear of teeth or dental surgery. |
| Odynophobia or Odynephobia |
Fear of pain. (Algophobia) |
| Oenophobia |
Fear of wines. |
| Oikophobia |
Fear of home surroundings, house. |
| Olfactophobia |
Fear of smells. |
| Ombrophobia |
Fear of rain or of being rained on. |
| Ommetaphobia or Ommatophobia |
Fear of eyes. |
| Oneirogmophobia |
Fear of wet dreams. |
| Oneirophobia |
Fear of dreams. |
| Onomatophobia |
Fear of hearing a certain word or of names. |
| Ophidiophobia |
Fear of snakes. (Snakephobia) |
| Ophthalmophobia |
Fear of being stared at. |
| Opiophobia |
Fear medical doctors experience of prescribing needed pain medications for patients. |
| Optophobia |
Fear of opening one's eyes. |
| Ornithophobia |
Fear of birds. |
| Orthophobia |
Fear of property. |
| Osmophobia or Osphresiophobia |
Fear of smells or odors. |
| Ostraconophobia |
Fear of shellfish. |
| Ouranophobia |
Fear of heaven. |
