harshness vs malice

harshness and malice both are nouns.

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

As nouns, malice is a hypernym of harshness; that is, malice is a word with a broader meaning than harshness:

Other hypernyms of harshness include malevolence, malevolency.

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