harshness vs abrasiveness

harshness and abrasiveness both are nouns.

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

As nouns, harshness and abrasiveness are synonyms defined as:

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

Other synonyms of harshness include scratchiness.

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