A List of Phobias Beginning with 'O'

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.(Domatophobia, Eicophobia)

Olfactophobia

Fear of smells.

Ombrophobia

Fear of rain or of being rained on.

Ommetaphobia or Ommatophobia

Fear of eyes.

Omphalophobia

Fear of belly buttons.

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 or Uranophobia

Fear of heaven.