malice vs harshness

malice and harshness both are nouns.

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

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

malice (noun)	harshness (noun)
the quality of threatening evil	the quality of being harsh or rough or grating to the senses
feeling a need to see others suffer	excessive sternness
	the roughness of a substance that causes abrasions
	the quality of being cruel and causing tension or annoyance