roughness vs scaliness

roughness and scaliness both are nouns.

Word	Noun	Adjective	Verb	Adverb
roughness	Yes	No	No	No
scaliness	Yes	No	No	No

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

roughness: a texture of a surface or edge that is not smooth but is irregular and uneven
scaliness: the property of being scaly

roughness (noun)	scaliness (noun)
harsh or severe speech or behavior	the property of being scaly
a texture of a surface or edge that is not smooth but is irregular and uneven
the quality of being harsh or rough or grating to the senses
an unpolished unrefined quality
the formation of small pits in a surface as a consequence of corrosion
used of the sea during inclement or stormy weather
rowdy behavior