murderousness vs harshness

murderousness and harshness both are nouns.

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

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

Other hypernyms of murderousness include cruelness, cruelty.

murderousness (noun)	harshness (noun)
cruelty evidence by a capability to commit murder	the quality of being harsh or rough or grating to the senses
a bloodthirsty hatred arousing murderous impulses	excessive sternness
	the roughness of a substance that causes abrasions
	the quality of being cruel and causing tension or annoyance