You searched for: “xerophobia
xerophobia (s) (noun), xerophobias (pl)
1. An abnormal fear of dryness or of dry places: Deserts are one example of a xerophobia because it is where one may fear not getting enough water to survive.

In biology, a xerophobia is an aversion to dry places by animals or an inability of certain plants to survive in dry places.

2. The inhibition of salivary flow resulting in a dry mouth: Such xerophobias are caused by emotional conditions ; such as, fear, anger, or excessive excitement.