excess vs excessiveness

excess and excessiveness both are nouns.

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

As nouns, excess and excessiveness are synonyms defined as:

excess and excessiveness: immoderation as a consequence of going beyond sufficient or permitted limits

Other synonyms of excess include inordinateness.

excess (noun)	excessiveness (noun)
excessive indulgence	immoderation as a consequence of going beyond sufficient or permitted limits
immoderation as a consequence of going beyond sufficient or permitted limits
a quantity much larger than is needed
the state of being more than full

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