Phobia
A phobia (from the ) is a strong fear about a specific thing or situation.  In psychology, phobia is considered an anxiety disorder.  Phobia is different than just being scared of something.  The fear is so strong that it affects, and often damages, the sufferer's life.  For example, the person will usually do everything they can to avoid the thing they fear.  If they cannot avoid that thing, they will suffer from very strong anxiety which can damage their social relationships, their ability to work, and other areas of their everyday life.