deadliness vs morbidity

deadliness and morbidity both are nouns.

Word	Noun	Adjective	Verb	Adverb
deadliness	Yes	No	No	No
morbidity	Yes	No	No	No

As nouns, morbidity is a hypernym of deadliness; that is, morbidity is a word with a broader meaning than deadliness:

Other hypernyms of deadliness include morbidness, unwholesomeness.

deadliness (noun)	morbidity (noun)
the quality of being deadly	the quality of being unhealthful and generally bad for you
	an abnormally gloomy or unhealthy state of mind
	the relative incidence of a particular disease