breadth vs largeness

breadth and largeness both are nouns.

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

As nouns, breadth and largeness are synonyms defined as:

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

Other synonyms of breadth include comprehensiveness.

breadth (noun)	largeness (noun)
the extent of something from side to side	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
	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