pettiness vs narrowness

pettiness and narrowness both are nouns.

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

As nouns, narrowness is a hypernym of pettiness; that is, narrowness is a word with a broader meaning than pettiness:

pettiness: narrowness of mind or ideas or views
narrowness: an inclination to criticize opposing opinions or shocking behavior

Other hypernyms of pettiness include narrow-mindedness.

pettiness (noun)	narrowness (noun)
the quality of being unimportant and petty or frivolous	the property of being narrow; having little width
lack of generosity in trifling matters	a small margin
narrowness of mind or ideas or views	an inclination to criticize opposing opinions or shocking behavior
	a restriction of range or scope