pettiness vs tightness

pettiness and tightness both are nouns.

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

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

pettiness (noun)	tightness (noun)
the quality of being unimportant and petty or frivolous	lack of movement or room for movement
lack of generosity in trifling matters	extreme stinginess
narrowness of mind or ideas or views	the spatial property of being crowded together
	a tight feeling in some part of the body
	a state occasioned by scarcity of money and a shortage of credit