virulency vs injuriousness

virulency and injuriousness both are nouns.

Word	Noun	Adjective	Verb	Adverb
virulency	Yes	No	No	No
injuriousness	Yes	No	No	No

As nouns, injuriousness is a hypernym of virulency; that is, injuriousness is a word with a broader meaning than virulency:

virulency: extreme harmfulness (as the capacity of a microorganism to cause disease)
injuriousness: destructiveness that causes harm or injury

Other hypernyms of virulency include harmfulness.

virulency (noun)	injuriousness (noun)
extreme harmfulness (as the capacity of a microorganism to cause disease)	destructiveness that causes harm or injury
extreme hostility