shortness vs skimpiness

shortness and skimpiness both are nouns.

Word	Noun	Adjective	Verb	Adverb
shortness	Yes	No	No	No
skimpiness	Yes	No	No	No

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

shortness: the property of being of short spatial extent
skimpiness: Of a garment, the property of being very small, light, or revealing.

Other hyponyms of shortness include scantiness.

shortness (noun)	skimpiness (noun)
an abrupt discourteous manner	Of a garment, the property of being very small, light, or revealing.
the property of being shorter than average stature
the property of being of short temporal extent
the property of being of short spatial extent
the property of being truncated or short
the condition of being short of something