breadth vs narrowness

breadth and narrowness both are nouns.

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

As nouns, narrowness is a hyponym of breadth; that is, narrowness is a word with a more specific, narrower meaning than breadth:

Other hyponyms of breadth include broadness, wideness, beam.

breadth (noun)	narrowness (noun)
the extent of something from side to side	the property of being narrow; having little width
the capacity to understand a broad range of topics	a small margin
	an inclination to criticize opposing opinions or shocking behavior
	a restriction of range or scope