fullness vs comprehensiveness

fullness and comprehensiveness both are nouns.

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

As nouns, fullness and comprehensiveness are synonyms defined as:

fullness (noun)	comprehensiveness (noun)
greatness of volume	the capacity to understand a broad range of topics
the property of a sensation that is rich and pleasing	completeness over a broad scope
the condition of being filled to capacity
completeness over a broad scope