scratchiness vs harshness

scratchiness and harshness both are nouns.

Word	Noun	Adjective	Verb	Adverb
scratchiness	Yes	No	No	No
harshness	Yes	No	No	No

As nouns, scratchiness and harshness are synonyms defined as:

scratchiness and harshness: the roughness of a substance that causes abrasions

Other synonyms of scratchiness include abrasiveness.

scratchiness (noun)	harshness (noun)
the roughness of a substance that causes abrasions	the quality of being harsh or rough or grating to the senses
	excessive sternness
	the roughness of a substance that causes abrasions
	the quality of being cruel and causing tension or annoyance