Fear of disorders known as phobias are medical conditions defined as an uncontrollable, irrational, and persistent fear of a specific object, situation, or activity. There are many variations in the list of Phobias. The most common phobias include Arachnophobia, Fear of Spiders. Social Phobia, Fear of being evaluated negatively in social situations. Aerophobia, Fear of flying. Agoraphobia fear of any situation where escape might be difficult from sudden panic-like symptoms. Claustrophobia, Fear of being trapped in small confined spaces. Acrophobia, Fear of heights. Emetophobia, Fear of vomit. Carcinophobia, Fear of cancer. Brontophobia, Fear of thunderstorms. Necrophobia,Fear of death or or dead things.