thirstiness

noun

1.
a deficiency of moisture (especially when resulting from a permanent absence of rainfall)
droughtlove dryth parch rainlack aridity aridness
Derived from:
thirsty
2.
a physiological need to drink
thirsty thirst
Derived from:
thirsty
3.
strong desire for something (not food or drink)
hunger hungriness thirst
Derived from:
thirsty