Final answer:
The fear of water is known as Hydrophobia, which is different from Acrophobia (fear of heights), Orthophobia (fear of correctness), and Gynophobia (fear of women).
Step-by-step explanation:
The question asked is: What is fear of water called: Acrophobia, Hydrophobia, Orthophobia (fear of correctness), or Gynophobia?
The fear of water is called Hydrophobia. This term is derived from the Greek words 'hydro' meaning water, and 'phobia' meaning fear. Acrophobia is the fear of heights, Orthophobia refers to the fear of correctness, and Gynophobia is the fear of women. It's important to note that hydrophobia can also refer to a symptom of rabies, where the infected individual has difficulty swallowing and shows panic when presented with liquids to drink.