Phobias O

• Obesophobia or Pocrescophobia - phobia of weight gain
  
• Ochlophobia - phobia of crowds
  
• Ochophobia - phobia of vehicles
• Octophobia - phobia of eight 8
• Odontophobia or Dentophobia - phobia of dentists
• Odynephobia or Agliophobia or Algophobia or Odynophobia - phobia of pain
• Oenophobia - phobia of wines
• Oikophobia or Domatophobia or Eicophobia - phobia of houses
• Olfactophobia - phobia of smells
• Ombrophobia or Pluviophobia - phobia of rain
  
• Ommatophobia or Ommetaphobia or Optophobia - phobia of eyes
• Omphalophobia - phobia of belly buttons
• Oneirogmophobia - phobia of wet dreams
• Oneirophobia - phobia of dreams
• Ophidiophobia or Snakephobia - phobia of snakes
• Ophthalmophobia or Scopophobia or Scoptophobia - phobia of staring
  
• Opiophobia - phobia of prescribing
  
• Ornithophobia - phobia of birds
• Orthophobia - phobia of property
• Osmophobia or Osphresiophobia - phobia of odours
• Ostraconophobia - phobia of shellfish
• Otisophobia - phobia of lifts
  
• Ouranophobia or Uranophobia - phobia of heaven