hunger vs thirstiness

hunger and thirstiness both are nouns.

Word	Noun	Adjective	Verb	Adverb
hunger	Yes	No	Yes	No
thirstiness	Yes	No	No	No

As nouns, hunger and thirstiness are synonyms defined as:

Other synonyms of hunger include hungriness, thirst.

hunger (noun)	thirstiness (noun)
strong desire for something (not food or drink)	strong desire for something (not food or drink)
a physiological need for food; the consequence of food deprivation	a physiological need to drink
	a deficiency of moisture (especially when resulting from a permanent absence of rainfall)

hunger (verb)	thirstiness (verb)
be hungry; go without food
have a craving, appetite, or great desire for
feel the need to eat