Topophobia is the fear of places or situations that are high up, such as tall buildings or bridges. People with this condition may feel anxious, panicked, or dizzy when in such places. Some synonyms for topophobia include acrophobia, vertigo, altitude sickness, and height phobia. Acrophobia is a specific phobia that causes an intense fear of heights, while vertigo is a sensation of spinning or dizziness, often experienced when looking down from a great height. Altitude sickness is a condition that occurs when the body is unable to adjust to high altitudes, causing symptoms such as headache, nausea, and dizziness. Height phobia is a general term that refers to a fear of heights.