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. 

Olfactophobia- Fear of smells. 

Ombrophobia- Fear of rain or of being rained on. 

Ommetaphobia or Ommatophobia- Fear of eyes. 

Oneirophobia- Fear of dreams. 

Oneirogmophobia- Fear of wet 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. 

Ostraconophobia- Fear of shellfish. 

Ouranophobia- Fear of heaven. 
 
 

P-

Pagophobia- Fear of ice or frost. 

Panthophobia- Fear of suffering and disease. 

Panophobia or Pantophobia- Fear of everything. 

Papaphobia- Fear of the Pope. 

Papyrophobia- Fear of paper. 

Paralipophobia- Fear of neglecting duty or responsibility. 

Paraphobia- Fear of sexual perversion. 

Parasitophobia- Fear of parasites. 

Paraskavedekatriaphobia- Fear of Friday the 13th. 

Parthenophobia- Fear of virgins or young girls. 

Pathophobia- Fear of disease. 

Patroiophobia- Fear of heredity. 

Parturiphobia- Fear of childbirth. 

Peccatophobia- Fear of sinning. (imaginary crime) 

Pediculophobia- Fear of lice. 

Pediophobia- Fear of dolls. 

Pedophobia- Fear of children. 

Peladophobia- Fear of bald people. 

Pellagrophobia- Fear of pellagra. 

Peniaphobia- Fear of poverty. 

Pentheraphobia- Fear of mother-in-law. (Novercaphobia) 

Phagophobia- Fear of swallowing or of eating or of being eaten. 

Phalacrophobia- Fear of becoming bald. 

Phallophobia- Fear of a penis, esp erect. 

Pharmacophobia- Fear of taking medicine. 

Phasmophobia- Fear of ghosts. 

Phengophobia- Fear of daylight or sunshine. 

Philemaphobia or Philematophobia- Fear of kissing. 

Philophobia- Fear of falling in love or being in love. 

Philosophobia- Fear of philosophy. 

Phobophobia- Fear of phobias. 

Photoaugliaphobia- Fear of glaring lights. 

Photophobia- Fear of light. 

Phonophobia- Fear of noises or voices or one's own voice; of telephones. 

Phronemophobia- Fear of thinking. 

Phthiriophobia- Fear of lice. (Pediculophobia) 

Phthisiophobia- Fear of tuberculosis. 

Placophobia- Fear of tombstones. 

Plutophobia- Fear of wealth. 

Pluviophobia- Fear of rain or of being rained on. 

Pneumatiphobia- Fear of spirits. 

Pnigophobia or Pnigerophobia- Fear of choking of being smothered. 

Pocrescophobia- Fear of gaining weight. (Obesophobia) 

Pogonophobia- Fear of beards. 

Poliosophobia- Fear of contracting poliomyelitis. 

Politicophobia- Fear or abnormal dislike of politicians. 

Polyphobia- Fear of many things. 

Poinephobia- Fear of punishment. 

Ponophobia- Fear of overworking or of pain. 

Porphyrophobia- Fear of the color purple. 

Potamophobia- Fear of rivers or running water. 

Potophobia- Fear of alcohol. 

Pharmacophobia- Fear of drugs. 

Proctophobia- Fear of rectum. 

Prosophobia- Fear of progress. 

Psellismophobia- Fear of stuttering. 

Psychophobia- Fear of mind. 

Psychrophobia- Fear of cold. 

Pteromerhanophobia- Fear of flying. 

Pteronophobia- Fear of being tickled by feathers. 

Pupaphobia - fear of puppets 

Pyrexiophobia- Fear of Fever. 

Pyrophobia- Fear of fire.