fullness vs largeness

fullness and largeness both are nouns.

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

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

Other hypernyms of fullness include bigness.

fullness (noun)	largeness (noun)
greatness of volume	the property of having a relatively great size
the property of a sensation that is rich and pleasing	large or extensive in breadth or importance or comprehensiveness
the condition of being filled to capacity	the quality of being pretentious (behaving or speaking in such a manner as to create a false appearance of great importance or worth)
completeness over a broad scope	the capacity to understand a broad range of topics