Fears & Phobias: Beginning with 'o'
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.
Optophobia: Fear of opening one's eyes.
Ornithophobia: Fear of birds.
Orthophobia: Fear of property.
Osmophobia or Osphresiophobia: Fear of smells or odors.