sponginess vs spongy

sponginess is a noun but spongy is not a noun.

Word	Noun	Adjective	Verb	Adverb
sponginess	Yes	No	No	No
spongy	No	Yes	No	No

sponginess (noun)	spongy (noun)
the porosity of a sponge
the property of being able to occupy less space

sponginess (adjective)	spongy (adjective)
	like a sponge in being able to absorb liquids and yield it back when compressed
	easily squashed; resembling a sponge in having soft porous texture and compressibility