solidity vs fullness

solidity and fullness both are nouns.

Word	Noun	Adjective	Verb	Adverb
solidity	Yes	No	No	No
fullness	Yes	No	No	No

As nouns, fullness is a hypernym of solidity; that is, fullness is a word with a broader meaning than solidity:

solidity (noun)	fullness (noun)
the quality of being solid and reliable financially or factually or morally	greatness of volume
the consistency of a solid	the property of a sensation that is rich and pleasing
state of having the interior filled with matter	the condition of being filled to capacity
	completeness over a broad scope