littleness vs tightness

littleness and tightness both are nouns.

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

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

littleness (noun)	tightness (noun)
the property of having a relatively small size	lack of movement or room for movement
lack of generosity in trifling matters	extreme stinginess
the property of having relatively little strength or vigor	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