grievous vs evil

grievous is not a noun while evil is a noun.

Word	Noun	Adjective	Verb	Adverb
grievous	No	Yes	No	No
evil	Yes	Yes	No	No

grievous (noun)	evil (noun)
	morally objectionable behavior
	the quality of being morally wrong in principle or practice

grievous (adjective)	evil (adjective)
causing fear or anxiety by threatening great harm	morally bad or wrong
shockingly brutal or cruel	having or exerting a malignant influence
of great gravity or crucial import; requiring serious thought	having the nature of vice
causing or marked by grief or anguish