tightness vs pettiness

tightness and pettiness both are nouns.

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

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

Other hyponyms of tightness include littleness, smallness, miserliness.

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