five of the most common phobia are 1. Arachnophobia: The fear of spiders. 2. Ophidiophobia: The fear of snakes. 3. Acrophobia: The fear of heights. This fear can lead to anxiety attacks and avoidance of high places. 4. Agoraphobia: The fear of situations in which escape is difficult. This may include crowded areas, open spaces, or situations that are likely to trigger a panic attack. People will begin avoiding these trigger events, sometimes to the point that they cease leaving their home. 5. Cynophobia: The fear of dogs. This phobia is often associated with specific personal experiences, such as being bitten by a dog during childhood.