smallness vs parsimoniousness

smallness and parsimoniousness both are nouns.

Word	Noun	Adjective	Verb	Adverb
smallness	Yes	No	No	No
parsimoniousness	Yes	No	No	No

As nouns, parsimoniousness is a hypernym of smallness; that is, parsimoniousness is a word with a broader meaning than smallness:

smallness (noun)	parsimoniousness (noun)
the property of having a relatively small size	extreme care in spending money; reluctance to spend money unnecessarily
lack of generosity in trifling matters	extreme stinginess
the property of being a relatively small amount
the property of having relatively little strength or vigor
The quality of being minor in influence, power, or rank.