hungriness vs hunger

hungriness and hunger both are nouns.

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

As nouns, hungriness and hunger are synonyms defined as:

Other synonyms of hungriness include thirst, thirstiness.

As nouns, hungriness and hunger are synonyms defined as:

hungriness and hunger: a physiological need for food; the consequence of food deprivation

hungriness (noun)	hunger (noun)
strong desire for something (not food or drink)	strong desire for something (not food or drink)
prolonged unfulfilled desire or need	a physiological need for food; the consequence of food deprivation
a physiological need for food; the consequence of food deprivation

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