excess vs fullness

excess and fullness both are nouns.

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

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

excess (noun)	fullness (noun)
excessive indulgence	greatness of volume
immoderation as a consequence of going beyond sufficient or permitted limits	the property of a sensation that is rich and pleasing
a quantity much larger than is needed	the condition of being filled to capacity
the state of being more than full	completeness over a broad scope

excess (adjective)	fullness (adjective)
more than is needed, desired, or required