largeness vs comprehensiveness

largeness and comprehensiveness both are nouns.

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

As nouns, largeness and comprehensiveness are synonyms defined as:

largeness and comprehensiveness: the capacity to understand a broad range of topics

Other synonyms of largeness include breadth.

largeness (noun)	comprehensiveness (noun)
the property of having a relatively great size	the capacity to understand a broad range of topics
large or extensive in breadth or importance or comprehensiveness	completeness over a broad scope
the quality of being pretentious (behaving or speaking in such a manner as to create a false appearance of great importance or worth)
the capacity to understand a broad range of topics