Collectively, phobic disorders (including social anxiety disorder [social phobia], specific phobia, and agoraphobia) are the most common forms of psychiatric illness, surpassing the rates of mood disorders and substance abuse. Severity can range from mild and unobtrusive to severe and can result in incapacity to work, travel, or interact with others. (Medscape)

Look here for several different types of phobia.

Also check out http://www.fearof.net/ for top 100, and top 10 list of phobias.

TOP 10 PHOBIA LIST

• 1. Fear of Spiders – Arachnophobia
• 2. Fear of Snakes – Ophidiophobia
• 3. Fear of Heights – Acrophobia
• 4. Fear of Open Spaces – Agoraphobia
• 5. Fear of Dogs – Cynophobia
• 6. Fear of Thunderstorms – Astraphobia
• 7. Fear of Small Spaces – Claustrophobia
• 8. Fear of Germs – Mysophobia
• 9. Fear of Flying – Aerophobia
• 10. Fear of Holes – Trypophobia

Friggatriskaidekaphobia

• Fear of Friday the 13th.
• You could have also had paraskavedekatriaphobia or paraskevidekatriaphobia for the same fear.

Coulrophobia   =  Fear of clowns (not just restricted to the evil ones)

Agents that may be considered for agoraphobia include the following: